Wow, two posts in one day. Anyway, here is my latest creation, the ball juggler! It's a kinetic sculpture that is built just for entertainment. Ping pong balls are thrown into a basket with a catapult. It's powered by a motor, and a rubber band makes the catapult shoot the balls. A pusher rotates, and it pushes the catapult back. There's a ball dispenser on the catapult side which loads one ball at a time into the catapult.
EDIT: The name has been changed from catapult machine to ball juggler. It just sounds better. :-)
I built Version 2 of my squirrel trap! It's much better than the old one, and I made it use metallics. :-) This is a preview because I'm going to post another topic with more pictures, and explain it more.