Cornell student Levi Lorenzo wanted to do a project about MIDI music technology, so the project he came up with was to build a hamster controlled music generator. The hamster controller uses 6 hamsters to control 3 rythmic tones. One hamster controls the "rythmic qualities of the melodies", and the other controls the note sequence. As the hamsters wander back and forth in their passages, the music created changes according to their position. The music is actually not bad!
On Levi's web page, there are links to more information, sound recordings, and a video of the hamsters making music.