And every piece of playground equipment, furniture, toy...basically whatever is available to climb that will present a challenge and cause mommy to sprout more gray hairs.
He's fearless, but there needs to be a balance of fear in the universe - for every fearless toddler, there is an equally fearful mother hovering nearby. (It would probably be more useful if I weren't hovering with the camera, but I'd drop it to catch him in a heartbeat.)