Last week, I helped with a two-day Kinetic Puppets class for 6-8 year olds. I've taught this before as a one-day class. The kids make two characters that move using bottle cap cams (Adam's project is on the right).

Last week I made an automata sculpture using a clock motor. I attached the main rod to the hour hand, and put 12 cams on it. When I made it, I was thinking about how to show time a different way (this is sort of like a linear clock), and also I really wanted to make an automata that is motor, not crank driven. The cams move very slowly - so slowly that you can't see them move if you just stare at it, so you have to go do something else and come back to notice a change.