Instrument Building Lab: Why don't Brass Instruments have holes?

Can you think of any brass instruments that have finger holes? No? Wanna know why? View on!
The BTT Instrument Building Lab is a series of instructional videos that will show you how to build many of the instruments that have come out of the BTT laboratories.
Bash the Trash Environmental Arts builds, performs and educates using musical instruments made from recycled and reused materials, a combination of science, sound and the environment. For over 20 years Bash the Trash has been providing performances, residencies and events that entertain, educate and inspire! www.bashthetrash.com