My son thought up his very first joke tonight. It goes like this:

Ambrose: Cows

Momma or Daddy: Moo

Ambrose and Momma or Daddy: Unrestrained laughter

This has been going on all night.

And it turns out, the more you think about it, it is pretty hilarious that cows say moo. Props to the youngster for finding the humor in the mundane