@Lazys The Dank Engineer In a nuclear reactor, more heat isnt always the best output. A reactor’s heat output is perfectly tuned to put out enough heat to turn the turbines just enough to maximize their output, while staying within a safe operating threshold.
My haters throw rocks at me and IT hurts. I hope they don't throw The Rock at me because I like him as an actor. GAGAGAGAGA!!! I am funny!!! I am the funniest RUclipsr EVAH! Please agree, dear no
This video truly shows off that efficiency is measured not only in how fast it does the thing you want it to do, but also in how many fewer improvements it needs compared to previous machines used to accomplish the same task
The best thing about this channel are the incremental improvements. Gives you the impression that anything is possible if you take one step at a time, and that failure is simply part of the process.
that final, more robust design for the circulating climber is absolutely incredible wow... looks like a model of some insanely complicated machine youd see in a scifi movie or like in a particle accelerator or a space station or smth hahah
@@tvbot6496 cmon bro you cant say “be quiet” now days, when something seems stupid, you gotta say “shut the fuck up” that’s how it’s done. Just kidding lol don’t curse
This channel never fails to amaze me. It's incredible how the simplest tools - plastic, a toy motor and rubber bands (and better tires) - can achieve basically anything by applying knowledge of engineering.
@@superhenkable I mean... Yes. You'd need a few extra things e.g. the food seeds and water and dirt, but you COULD make a machine to keep a plant alive. Also Lego cars have already surpassed 50kph. Smelting metal is a bit outside the capabilities of plastic, so I'd say put all the heat related stuff in the exceptions part.
I believe the last rotary design can be improved by placing some other weights opposite to the battery or use multiple batteries evenly distributed, to "centralise?" the centre of mass so that the centrifugal force doesn't pull the battery and start the wobble.
What fascinates me is that I'm sure he could already go for an already great prototype but he goes step by step to show why earlier steps in the making wouldn't work
I feel like the most efficient design would incorporate features from design 2 and 3. The 3 tension-braced pieces seemed to work really well with the bumps of the tree, but the spinning seemed to cause structural issues. So using wheels that go straight up instead of rotating, like in the first and second designs, could improve energy efficiency and also structural stability. What I like about the third design is that it is not necessarily locked within a maximum pole diameter, landing it well to getting over humps and obstacles. But the rotation seemed to only cause problems.
teacher: "in today's physics class we will calculate the forces for a Lego contraption to climb a flag pole" student: "This has no real world application what so ever". Teacher: "hold my beer"
I *love* how freaky and outright ALIEN the third climber's final form looks @7:46 It almost looks like oddly symmetrical broken junk but its SO EFFICIENT
I love how you didn’t even bother to remove the rope for the tests.. lol Because whatever Ghost Protocol style mission you’re planning with these robots probably won’t have ideal conditions. I look forward to the day when I see on the news “Mysterious individual stole both KFCs secret recipe and Coca Colas secret recipe and swapped their vaults. Motives are as of yet unclear, but the suspect used some sort of Lego robot army to accompany this very bizarre and nearly impossible goal. Tune in at 7 for the whole story, involving subnautical missions, pole climbing robots and little cars that could traverse any obstacle. You’re not going to want to miss this one.”
Also, a third way to deal with centrifugal force on the third design would be to balance the weight more. It wouldn't necessarily make the forces any less (in fact, since the only way I can think to balance the weight would be to ADD more weight to the other segments, it would probably INCREASE the force), but it would make the forces equal in all directions, which might help with the frame strength issues, since it would spread the load.
Honestly, how long until we get into the realm of building custom, aftermarket tungsten/lead/etc Lego bricks that would enable one to contain heat and radiation? Lego Technic -> Lego Atomic
How much I used to play with LEGO, and how much I liked them, especially when the Techincs came out! I'm 42 years old now, but you don't know how much I am inviting you !! Greetings from Italy
When I was younger 'around the turn of the century' I used to subscribe to the 'Lego catalogue' and always found the 'Technic sets' as more intimidatingly complicated compared to my fondness of following the theme sets w/the 'click and lock' nature of the typical pegged blocks; there was only one instance where we were using 'Technic' pieces for some kind of lesson in a g.4 class. I appreciate videos like this as 'the kind of ASMR' I appreciate in terms of what I hearing and the meaningfulness of what I'm looking at even if I wasn't say intimidated to the cost barrier to Lego Technic and being knowledgeable at using them on a consistent basis; methinks a fair amount of hands on science lessons on 'simple machines' can be effectively done w/them. The sensation of doing so is a valuable experience.
-first robot "this guy run out of ideas, boring, nothing new" -second robot "hmmm cool design with rubbers" -third robot "centrifugal force goes brrrrrr, best channel ever!!!"
Love this channel. Version 3 is my favorite. I would have remade V2 into a hexagon orientation instead of the square design, each wheel being a 'corner'.
Such rigorous engineering, impressive physics knowledge, and evident video production quality and skills. You, my friend, have this down. I'm impressed.
I always like to imagine lots of little lego men in labcoats, sitting at these massive computers like nasa and going "Activate the device!" and it's just one of those spinny things going up a pole. "Catastrophic Failure" is it falling
On the last one you could maybe use the centrifugal force to your advantage: If you put a rope all around your vehicle and put a weight at the end (maybe put the weight in kind of a sled for control and on each of the 3 segments one of these mechanisms for balance). When the centrifugal force gets bigger the weight gets pushed outwards, pulls on the rope and tightens your robot even hatder against the pole. Disadvantage: only works once robot is spinning fast, no effect on not moving robot. For speeding up from a stand still you still need the rubber bands
@@oksuree i know. Centrifugal force is a myth ... in fact there is only centripetal force and the "centrifugal force" is nothing else than a pseudo-force resulting from Newtons 1st Law in conjunction with the centripetal force ... but if i would have written it this explanation instead of the term "centrifugal force" my post would have been even longer ... and face it: everyone understands the term "centrifugal force" ...
I had been thinking about a pole climber for some time for the exact reason of sending up a camera to do time lapses. The only thing that put me off is leaving something stuck up a pole or lamp post these days would probably end up with the police or the bomb squad turning up! Never thought of using lego though :-D This is brilliant.
My heart keeps pounding on the 3rd pole climber test, I really thought with the climber rotating that fast, something would be thrown off, but then I look at the corner of the screen it was sped up 10 times... XD
Every time I think you have done it all with Legos, you find something new to blow my mind with. Keep up the good videos! I also enjoy that I can watch your content muted while in bed.
I played Lego as a kid. every time the robot doesn't work, I got so frustrated I smacked it on the ground. There's something cathartic watching all these problems solved by simple physics
First design is my favorite because the method for increasing grip was not initially intuitive but works very well and simple. 3rd one is just fancy and cool.
The stark contrast of improving the grip with mathematical concepts and just straight up "better tires :)" got a good chuckle out of me haha
i mean, he explained the concepts often enough at this point, but same :D
@@lit_for_20 I'm new here so it made it all the more hilarious to me X'D
Higher coefficient of friction. ;)
*sips le epic tea* Yeah, plebian. I watch Rickman accompanied by Mortimeister daily as well.
@@Santa-614 ruclips.net/video/dVqUI2MS4Os/видео.html
3 Ways to Improve your life:
1) Exercise
2) Eat Healthy
3) Better Tires
Ka-chow
Good set of snow tires will change your life in winter
@@twosquids exept if you got no car
Eat. Sleep. And repeat
And low the center of mass
Ways to improve nuclear reactor output:
- More fissile fuel
- Move efficient energy extraction
- Better tires
Ah yes, my favorite fuel
fissile fuel
@Lazys The Dank Engineer In a nuclear reactor, more heat isnt always the best output. A reactor’s heat output is perfectly tuned to put out enough heat to turn the turbines just enough to maximize their output, while staying within a safe operating threshold.
@@godzillaridergamer7595 and better tires maximize grip
I love that no one is focusing in the better tires
Are we still capped with turbines? There's truly no other way to convert heat to electrical without going through mechanical?
3 Ways to improve CPU performance:
1- Making Transistors Closer to Eachother
2- Adding More Computing Units
3- Better Tires
3: better fans
@@vehicleboi5598 better tires improve cpu grip
@@SimplifiedTags grips onto all of the equations better meaning faster performance
@@SimplifiedTags better grip on programs: less crashing because it (almost) newer falls!
Adding more cooling
ways to make your computer run smoother:
-install a high quality SSD
-install more ram
-better tires
better tires.
Dumb comment
@@texasrox2010 better tires
@@texasrox2010 better tires
@@texasrox2010 better tires
My takeaway from this is:
In case of machine rebellion, hide up on some tree with all the good tires you can carry
Sounds awfully.... Vietnamese of you
That was good laugh my friend
How many tires can you carry??? 🔥🔥🔥
You made my day
what about drones
I didn't expect to get some engineering lessons from a LEGO Technic channel. But then again, it's LEGO Technic.
My haters throw rocks at me and IT hurts. I hope they don't throw The Rock at me because I like him as an actor. GAGAGAGAGA!!! I am funny!!! I am the funniest RUclipsr EVAH! Please agree, dear no
@@AxxLAfriku say no to drugs kid.
He is the LEGO equivalent of Mark Rober.
@@RileyBanksWho lmaooooo
@LEANBOX Nah, I just think this might be the first time he used actual physics equations to explain how he improves on his design.
Imagine explaining to someone why you're sending lego bricks up their flagpole.
Lol
"My goals are beyond your understanding"
?????
To make a minifig's wish come true
Is that an innuendo
Those spinning ones are intense
Spinning! That’s a good trick
While watching this, I called it: the spinny spinning spinner (try to say that 10 time fast)
Yeah just like woman
they remind me of my mom
@@Rodrigo-jd2wg 🤨
This video truly shows off that efficiency is measured not only in how fast it does the thing you want it to do, but also in how many fewer improvements it needs compared to previous machines used to accomplish the same task
better tires
Ah yes, the Circular Climber. Or as I like to call it, the WEEEEEEE Climber.
spinny boi
Weeeeee
SPEEN!
Motorized nut.
speeeeeeeeeeeeeeen
Problems that better tires can solve:
-Little or no grip
-Crappy pole climbing performance
-Unstable relationship
and more...
Dumb comment
@@texasrox2010 Unstable relationship
@@Howhungry1234 you definetly have a better tire
@@texasrox2010 Unstable relationship
The best thing about this channel are the incremental improvements. Gives you the impression that anything is possible if you take one step at a time, and that failure is simply part of the process.
Very true, a good example is space projects.
That's how to think of it! You didn't fail, you simply discovered an ineffective method. You'll improve that and do even better next time. :)
In the words of Zenyatta; "Failure is acceptable, giving up is not"
that final, more robust design for the circulating climber is absolutely incredible wow... looks like a model of some insanely complicated machine youd see in a scifi movie or like in a particle accelerator or a space station or smth hahah
I really appreciate his ability to deduce what exactly is going wrong / needs improvement. I'd just be like "it's broken lol"
If this guy was a Physics teacher, I would learn everything he teaches. Imagine the class projects being these Lego projects. Such a fun way to learn
Also imagine ending physics class with "So the lesson of today is:" real life pole/tree climbing is difficult"
now THAT would be great
Yeah. Too bad most teachers want us to be as miserable as they are
Yes
@@user-re2xx1wl1j он пишет про то что зочет уроки физики от пвтора видео
1960: flying cars!
2021: climbing lego robots.
Be quiet
Honestly, climbing legos are much better than flying cars.
@@jd_the_cat yup car crashes would land on your house
@@tvbot6496 cmon bro you cant say “be quiet” now days, when something seems stupid, you gotta say “shut the fuck up” that’s how it’s done. Just kidding lol don’t curse
@@mr.engineear0987 then shut the fuck up, i guess (jk)
This channel never fails to amaze me. It's incredible how the simplest tools - plastic, a toy motor and rubber bands (and better tires) - can achieve basically anything by applying knowledge of engineering.
I agree
basically anything? could you smelt metal with lego? what about grow food? Could you make a car that goes 50 kph?
@@superhenkable I mean... Yes. You'd need a few extra things e.g. the food seeds and water and dirt, but you COULD make a machine to keep a plant alive.
Also Lego cars have already surpassed 50kph.
Smelting metal is a bit outside the capabilities of plastic, so I'd say put all the heat related stuff in the exceptions part.
@@jblen wonder why we even bother building anything else then, if you can just use lego for everything would be very convenient
@@superhenkable you're missing the point. But anyway it wouldn't be convenient at all.
I believe the last rotary design can be improved by placing some other weights opposite to the battery or use multiple batteries evenly distributed, to "centralise?" the centre of mass so that the centrifugal force doesn't pull the battery and start the wobble.
Or with better tires
(4:12) The sound that the car makes at 10x speed tho XD
What fascinates me is that I'm sure he could already go for an already great prototype but he goes step by step to show why earlier steps in the making wouldn't work
“Lego is for Kids”
This man: *university level physics*
I mean, it’s not really University level, but the point still stands
@@Kelvoraax It's technically on the level of Physics 2 with torque and everything honestly.
Dude i learned this stuff in 7th grade
@@djvnc1967 china problems
@@djvnc1967 yh I learnt that too, but do I remember, no not really so this might as well be uni level
I was already impressed… but the circular design is what convinced me this man is going to get to space with Lego
Yeah, the only thing left is find a space-high tree
That design gave me Event Horizon core vibes as it whirred to life. Space and beyond i'd say. For better or for worse.
@@gromaxe nah just really good tires
7:07 it sounds like your drink is done
I feel like the most efficient design would incorporate features from design 2 and 3. The 3 tension-braced pieces seemed to work really well with the bumps of the tree, but the spinning seemed to cause structural issues. So using wheels that go straight up instead of rotating, like in the first and second designs, could improve energy efficiency and also structural stability.
What I like about the third design is that it is not necessarily locked within a maximum pole diameter, landing it well to getting over humps and obstacles. But the rotation seemed to only cause problems.
Love this channel. No annoying intro, just straight to interesting content.
Robot 3 be like:
I live in spain, but the A is silent.
Robot 3 after first test: well, now it's the "S" that's silent.
I now expect a failed test and some spiiiin
@@Living_Murphys_Law PIN?
@@zackiet731 pain
@@zackiet731 No, just the s.
Pain.
teacher: "in today's physics class we will calculate the forces for a Lego contraption to climb a flag pole"
student: "This has no real world application what so ever".
Teacher: "hold my beer"
“Real world application? You ever heard of ‘content strategy’?”
I *love* how freaky and outright ALIEN the third climber's final form looks @7:46
It almost looks like oddly symmetrical broken junk but its SO EFFICIENT
Today, pole-climbing lego robots.
Tomorrow, pole-dancing lego robots.
That first zoom in on the minifig put a huge smile on my face. Thanks for that :)
When the third one starts spinning, you could have put interstellar music and it'd be hilarious
Music? What's that? :)
“That little manoeuvre’s gonna cost us 51 4X2 bricks…”
@@philcorrigan5641 Ah, a fellow interstellar fan.
@@AlvarBerglind No time for caution, by Hans Zimmer
It’s not possible
No, it’s necessary.
This is the wildest one yet I think, aside from the gear reduction thing
I love how you didn’t even bother to remove the rope for the tests.. lol
Because whatever Ghost Protocol style mission you’re planning with these robots probably won’t have ideal conditions.
I look forward to the day when I see on the news “Mysterious individual stole both KFCs secret recipe and Coca Colas secret recipe and swapped their vaults. Motives are as of yet unclear, but the suspect used some sort of Lego robot army to accompany this very bizarre and nearly impossible goal. Tune in at 7 for the whole story, involving subnautical missions, pole climbing robots and little cars that could traverse any obstacle. You’re not going to want to miss this one.”
If I had this kind of technology, I would probably think of building a powered roller coaster. You are amazing.
I love how the gravity locking design resembles a scorpion
scorpion is gravity locked to ground
@@lemonice plus static electricity, they can climb walls
@@lemonice not with a couple well placed plasma grenades
@@PornsteinAndBrough nice
Teacher: Why didn’t you turn in your homework?
Me: 9:09
Never clicked a video so fast, really. This is probably one of my favourite channels on RUclips.
*us
I completely agree
This is the way.
same
Literally this. Entertaining, captivating, 100% content, great engineering topics.
Ways to improve skyscraper stability:
1. Increased supports
2. Stronger material for supports
3. Better tires
Also, a third way to deal with centrifugal force on the third design would be to balance the weight more. It wouldn't necessarily make the forces any less (in fact, since the only way I can think to balance the weight would be to ADD more weight to the other segments, it would probably INCREASE the force), but it would make the forces equal in all directions, which might help with the frame strength issues, since it would spread the load.
Crazy to think that none of these cool contraptions would've existed if Sir Isaac Newton never invented gravity
True true
Damn i never thought about that, you are right
Lol, remember he didn’t invent gravity
yea fuck that guy. In the old days it was so much easier when you could just fly everywhere....now we are stuck on the ground.
@@proftuna43 Yeah Galileo was the one who invented gravity
I bet you'd DEFINETLY get a strong grip into the tree bark if you replaced the rubber wheels with *saw blades*
Would require a lot of force to get into the bark
@@Lumadous *turn up the torque* lol
@@EZOnTheEyes would take more than that but its not impossible
DEFINITELY!
@Harrison Gist "LEGO saw blades" is the most cursed combination of words i've ever read lmao
Next episode 2 weeks later: “3 Pole Dancing LEGO Robots”
I mean, if you had a sliding weight to make part of it tilt back and forth without effecting the mechanism.... 👯
you beat me to this comment
Came here for this comment.
I was wondering if his indoor test pole was a stripper pole!
@@philp8872 MMMMH
Yes just casually has a stripper pole in his house
I hope
Me when i learn about letters in math: 5:05
This man just went through everything I learned in AP Physics up till now
People: I hate studying physics and math.
BEC: And what about physics and math with Lego?
People: I love physics and math!
BEC:. ;)
Thought you were going to go with the LOTR reference.
"And what about physics and math with Legos?"
"Aye, I could do that"
It's not a lesson really. Also he ain't working with numbers, there no calculation here, no math here.
@@wumbology3109 oh, you sweet summer child.
@@wumbology3109 yeah, but it's definitely an engineering lesson
This guy teaches physics better than my professor lmao
Bro this is engineering
yeah same lol
Maybe they'd teach better if they were paid a decent wage
@@illford Uhhhhh, physics is used by engineers in literally every project they work on.
@@illford what you mean by engineering?
Him now : making a pole climbing machine
Him later : look guys I made a fully functioning nuclear power plant
Here before this comment gets blown up
*with legos
@@albuspercivalwulfricbriand5110 *deez nuts
Honestly, how long until we get into the realm of building custom, aftermarket tungsten/lead/etc Lego bricks that would enable one to contain heat and radiation? Lego Technic -> Lego Atomic
@@watermelon8487 no u
That last model was cool man.
I believe it could be more affective with thicker tires having a high level of elasticity.
It's interesting that what seems like a convoluted design on the "perfect" pole works much better than others on the more natural imperfect pole.
did anyone else notice how each new robot type with a new pole-climbing method was actually orders of magnitude faster than the previous one?
and there is a good reason for that.
Better tires
2:37 it's over Anakin! I have the high ground!
you underestimate my power!
dont try it
Ahaaaaarg
When you had the angles and stuff on screen I wasn't expecting it to be so advanced lol .__.
Amazing job, you clearly know your stuff :D
Ok so I never payed attention in math and stuff but I learned more from this channel than ever. I’m 29. Thanks.
8:25 this reminds me of those CGI videos of proteins and stuff involved in cell division
Why would anyone dislike this. They got what they got: 3 climbing bois
2:35 “I see no god here, other than M E”
Never thought I would say this, I like watching legos climb trees
How much I used to play with LEGO, and how much I liked them, especially when the Techincs came out! I'm 42 years old now, but you don't know how much I am inviting you !! Greetings from Italy
When I was younger 'around the turn of the century' I used to subscribe to the 'Lego catalogue' and always found the 'Technic sets' as more intimidatingly complicated compared to my fondness of following the theme sets w/the 'click and lock' nature of the typical pegged blocks; there was only one instance where we were using 'Technic' pieces for some kind of lesson in a g.4 class.
I appreciate videos like this as 'the kind of ASMR' I appreciate in terms of what I hearing and the meaningfulness of what I'm looking at even if I wasn't say intimidated to the cost barrier to Lego Technic and being knowledgeable at using them on a consistent basis; methinks a fair amount of hands on science lessons on 'simple machines' can be effectively done w/them. The sensation of doing so is a valuable experience.
-first robot "this guy run out of ideas, boring, nothing new"
-second robot "hmmm cool design with rubbers"
-third robot "centrifugal force goes brrrrrr, best channel ever!!!"
Love this channel. Version 3 is my favorite. I would have remade V2 into a hexagon orientation instead of the square design, each wheel being a 'corner'.
Wow, Sick!
Noice if u see this
NeVEr gOnA gIvE u Up NeVer GoNa lEt yOu DOwn
No
Its beluga wow
i could watch him for like a million years and still not get bored
I love how the experimentation actually led to it climbing a real flag pole
Me: *walks back to my base that has villagers not realizing I have bad omen *
Pillagers: 4:13
2:33 Reminded me of the cat meme
I see no God up here
𝐎 𝐓 𝐇 𝐄 𝐑 𝐓 𝐇 𝐀 𝐍 𝐌 𝐄
lmao....hell yeah
Great ideas. Three spinning climber is my favorite. Seems most stable.
also looks like a sort of bugg moving upwards :0 its such a funny image :0
@@joppepeelen but it works pretty well
Neighbors:
"Now he then decided to spy on us from the flagpole with his toys!"
Such rigorous engineering, impressive physics knowledge, and evident video production quality and skills. You, my friend, have this down. I'm impressed.
Next episode:
“Making nail bombs with lego mechanical force”
"Making a Lego ICBM"
You invented a revolutionary machine for guys whos job is climbing tree
Really impressive stuff. Definitely my favorite video since the submarines! I hope we get a part 2 with more technical improvement, like it did.
Everyone: That's a UFO
him: That's flying lego with better *tires.*
I always like to imagine lots of little lego men in labcoats, sitting at these massive computers like nasa and going "Activate the device!" and it's just one of those spinny things going up a pole. "Catastrophic Failure" is it falling
On the last one you could maybe use the centrifugal force to your advantage:
If you put a rope all around your vehicle and put a weight at the end (maybe put the weight in kind of a sled for control and on each of the 3 segments one of these mechanisms for balance). When the centrifugal force gets bigger the weight gets pushed outwards, pulls on the rope and tightens your robot even hatder against the pole.
Disadvantage: only works once robot is spinning fast, no effect on not moving robot. For speeding up from a stand still you still need the rubber bands
There's no such thing as centrifugal force.
@@oksuree i know. Centrifugal force is a myth ... in fact there is only centripetal force and the "centrifugal force" is nothing else than a pseudo-force resulting from Newtons 1st Law in conjunction with the centripetal force ... but if i would have written it this explanation instead of the term "centrifugal force" my post would have been even longer ... and face it: everyone understands the term "centrifugal force" ...
I thought legos would never turn to this life, I can’t believe this…
I was looking for a comment like this lmao
I had been thinking about a pole climber for some time for the exact reason of sending up a camera to do time lapses. The only thing that put me off is leaving something stuck up a pole or lamp post these days would probably end up with the police or the bomb squad turning up! Never thought of using lego though :-D This is brilliant.
My heart keeps pounding on the 3rd pole climber test, I really thought with the climber rotating that fast, something would be thrown off, but then I look at the corner of the screen it was sped up 10 times... XD
Ways to improve literally anything:
1) Add hexagons
2) Use the fourth dimension
3) Better tires
The third one is very clever. I love it!
Wow thank you for your perseverance, that rope was one heck of an obstacle! And everything on the tree was too. 👍
At first i thought. "Pole climber, interesting." Now im like. "This is cool."
Smart ideas
Love these videos! Shows us the trial-n-error methods used to achieving the better model
Ah yes, now the governement will start replacing "birds" with a new species of "squirrels"
Every time I think you have done it all with Legos, you find something new to blow my mind with. Keep up the good videos! I also enjoy that I can watch your content muted while in bed.
4:45
meow.
When they reach the top of the flagpole, do they get a 1-up?
I played Lego as a kid.
every time the robot doesn't work,
I got so frustrated I smacked it on the ground.
There's something cathartic watching all these problems solved by simple physics
That circulating climber reminds me of something you'd have to deal with in an action RPG.
Next chapter: climbers with arms instead of wheels
This guy teaches me more physic stuff than my physic teacher
I totally lost it with the spinning climber xD
dude, you are getting better and better evey time. one of my fav channel on youtube
I love how the answer for everything on this channel is: “better tires”
3 ways to improve your drawings:
-practice
-criticism
-better tires
Better hands
Next video: how to make a working time traveling machine
I thought you were gonna combine them all into a super pole/tree climber at the end
That last clip looked like a bunch of squirrels chasing each other... Lego squirrels
First design is my favorite because the method for increasing grip was not initially intuitive but works very well and simple. 3rd one is just fancy and cool.