Nick: Mom, I got you a joke. (They always, always start with this.)
Me: Ok. (And you always, always have to say ok before he'll start.)
Nick: Knock knock.
Me: Who's there?
Nick: Big nerd.
Me: Big nerd who?
Nick: A big nerd on a great white!!
Now, let me just say, that it's almost impossible not to laugh at the weird combos he creates. The jokes are never funny, but the things he puts together are hilarious. We always have a really good laugh, which is the point of a joke anyway, isn't it?