Some clever person has built a little robot that runs around looking for things to drum on, drums on them, records the sounds, and makes little rhythms by playing back the sounds while drumming some more. There’s a web page about it here and here’s one of the several videos of it:
[The video is getting hit pretty hard so it may tell you that it’s not available; try back later if so.]
This is probably the sort of thing I’d be doing if I had more time on my hands. Robots were what got me interested in computers in the first place, but 30 years ago it was a lot harder to build robots than it is now and I never got much further than reading every book on robots and computers that the public library had at the time.