The Three Brother Goats Gruff

The Three Billy Goats Gruff - is a traditional Norwegian Fairy Tale, collected by Peter Christen Asbjørnsen and Jorgen Moe, concerning three billy goats (that's a term for a male goat) who are siblings (or in other variants a grandfather, father and son) and a troll who lives under a bridge. The goats want to cross the bridge to get to the plentiful grass on the other side.
The youngest and smallest goat crosses the bridge first. (At this point, if reading to a small child, it is traditional to say "trip trap, trip trap". Please imagine your own trip-trappings for the sake of efficiency.) The troll pops up and says; "Who's that trip-trapping over my bridge?"
The goat pleads with the troll to let him go because he's only small and skinny, but his brother is much bigger and meatier. Stupidly, the troll agrees to this, and lets the little goat go on his way.
Next the second goat comes along, and the process is repeated. The medium-sized goat tells the troll to wait for his bigger brother. (At this point, we can only hope that these goats knew their eldest sibling would be capable, as otherwise, serious questions must be raised about their filial loyalty) The troll, greed getting the better of him, agrees to wait for the third goat.
The third goat, unfortunately for the troll, turns out to be a badass among goats, and when the troll pops up to say his catch phrase, trounces the troll and throws him off the bridge. The goats all then live happily on the other side of the bridge. The End.
The moral of the story, presumably, is that the grass actually is greener on the other side, patience is not a virtue, violence solves everything, pass the buck if you're scared of facing a problem, and you shouldn't mess with goats. A Family-Unfriendly Aesop perhaps, it still remains a very popular story.