Hello, I've come across this toy called a "Switch Pitch" designed by Chuck Hoberman. It's a ball that when tossed into the air (with some amount of rotation), inverts and changes colour. Made of plastic, it's connected with numerous sockets and plates. It's quite hard to describe with words, so I'll include some links. http://i.stack.imgur.com/WWzUo.png Here's a picture of the ball in first position, then midair, then in its second position. A video of the ball being thrown: I'd really like to know about the forces that cause the ball to change colour, very curious about this. Thank you!