We are big believers in natural consequences in this house. If I had a nickel for every time I've told Me Too to sit nicely in his chair at the table rather than hang off the edge of the table by his elbows we'd be well on out way to a downpayment on some elementary fraction/equivalency materials.
Today, his elbows slipped and he wound up face first into his bowl of yogurt. Oh the crying! He wasn't too pleased that I took the time to snap a photo before I cleaned him up. Mean Mommy!