This video offers an HD look at circuit bending with a toy piano.

via klubmoozak:

!!Lo Fi in HiQu!!
“analogsat” preparing a little piano
complete “how to do” with an amazing circuit diagram!!
video by analogs.at
ingredients:
1 potentiometer (500kOhm)
1 switch
2 plug sockets (1 line out, 1 touchi effect)
1 of those chinese plasitc instruments – BATTERY POWERED – otherwise you may die 🙁