yeah im thinkin an old aspirin tin with BBs. with a contact mic on it and a toothbrush motor with an eccentric wheel to knock it in 4/4 time. a solar powered snare drum is also a possibility.
ok this is pretty cool if it can be made bigger the roller and motor would have to be on a slider grove of some type that can be pushes to the side and brought back by a spring. http://www.youtube.com/watch?v=3tXBjqmxkZg
damn i hope oki gets back from germany.