In the category of “cute robots” and just in time for the upcoming Pixar movie “Wall-E”, comes a drumming robot called Yellow Drum Machine. The thing can drive around, look at its environment, find something solid to drum on, and then start thumping away a cool little tune. It seems to have two arms to hit whatever it runs into, a thumper that can knock on the ground, and a little speaker to help with other sounds and beats.
Get a few of these things together and linked up on a network and you could make your own, real-life version of Animusic.