This guy made these cool robots. Basically they do experiments on themselves to figure out what shape they are and how their motors are wired up. Then you rip an arm off, and they do some more experiments to figure out their new shape.
I wonder if this explains the mean kitten experiment? The mobile kitten can do experiments to figure out what its legs and stuff do, but the immobile one cannot, so the mobile one gets more clues about the motion it sees than the immobile one.
Whatever, its a damn cool idea, though they clearly need to do some work on the walking thing!