David has a new game. It started with a piece of cardboard. He tapped himself on the head. John said, "Bonk." Oh my goodness that was funny. David tried it a couple more times. "Bonk. Bonk." It's so much fun, he's now tried it with books, his sister's hairbrush (after chewing on it of course), a food-covered plastic lid, a foam dinosaur dripping with water, and a rather heavy frog. Bonk bonk. David thinks it's just getting funnier and funnier.