Of Theo’s physics experiment. In this he was using a wood piece, which you can’t see in the pictures, as a fulcrum. The pooh-doll was being rocked via the wood weight on the other end. It was cool. Obviously basic, but he’s 4, and he worked all of it out by himself. He even suggested that I take a picture of him lying next to the creation, so that we had a ‘size reference.’