In Which My Son Learns to Be Cool

and he learned it from his sister.

We were all sitting at the table eating dinner, and Audrey turns to the Boy, and says, "Hey Nathan! Knuckles!" She holds out her fist and waits.

He grins, balls up his hand into a fist to match, and returns the move, big laugh included. He was already overjoyed at getting to sit at the table sans highchair and getting to say the prayer (which is also hilarious) that he just kept on laughing.