More Knock Knock Jokes

Here is the current knock knock joke:

H: Knock Knock

C:  Who dere?

H: Nana poo poo

C: Nana poo poo who?

H: Nana poo poo batman!

C: Nana poo poo batman who?

H: Nana poo poo batman that silly!

Today Colin was telling me this one:

C: Knock knock

Me:Who's There?

C: Nana (I don't know why they all start with Nana, but they do.)

Me: Nana Who?

C: Nana Mommy (or Daddy, or Train.)

which he thought was hilarious.