Pretzel letters
Today in the car, Emmett was snacking on pretzels. As he ate the first one, he held up a partially-eaten pretzel and told me he'd made a letter C .  Sure enough, he was holding a C  shaped bit of pretzel.  Over the course of the next few pretzels, he also made a  U, B, M, X, and a triangle, correctly identifying each one.  Not bad.