Ok, THIS is a genuine brag.

Every year I build a model ship. This year, he got all excited and demanded that we start. After an aha moment of "oh, I see, we build it upside down" he proceeded to remind me of the major error I made last year, and how I SHOULD have done it. Ok, the kid is two years old, and he remembers my boatbuilding mistakes and how to fix them... from last year?!?!?! That's just cool.

DS1: Hon, you already finished your homework
DS2: Quit it with the protesting already!