This is a 1979 Fisher Price radio that used to play Teddy Bears Picnic; I had one when I was a little boy. I bought this one second hand and messed about with it. I removed some of the tines on the music box mechanism, filed down some of the points on the cylinder, then I added another music box mechanism (with tines and points removed, bent and stuff). When you play them both together you get weird, scary, tinkly, discordant music. It also still has elements of Teddy Bears Picnic, mixed with recognisable notes from When You Wish Upon a Star - the other music box mechanism.
It's also for sale in my folksy shop, for a mere £15. Click here to go to the She Machine page in the shop.