mimeograph machine This was how the teacher made copies. In school, everyone called it the ditto machine. If the paper was still a bit wet when you got it, the ink would rub off on your fingers. I can still smell the ink :)
My magic rocks worked as well as my sea monkeys. Neither did squat. I can't grow indoor plants either. Just think how nervous I was with my first child! Both my kids survived though so I'm good at something.