My son sprung a project on me last night that is due on March 5. He needs to build a musical instrument and write a paper on how it works, etc. using a bunch of scientific terms. In his defense, he received the assignment on 2.26.08 so this isn't a procrastination issue.

Do any of you folks know of some type of instrument, probably percussion, that he could whip up in the shop with my guidance????

It seems like I have seen something out there before, but I didn't have any luck searching for (simple) stuff on the net.