Knock Knock

Aria decided she wanted to teach Zade a knock knock joke.  I'm not sure where she learned it (probably from other kids at pre-school), and I'm not much of a fan of the joke itself, but we found this little exchange quite funny.  Here's how the joke is supposed to go:

Person1: Knock knock
Person2: Who's there
Person1: Pee Pee
Person2: Pee Pee who?
Person1: Pee Pee you!

Yes, very high brow, I know.  Zade was a big fan of the punch line, as you can see, much to Aria's chagrin.  :)