How 3 year olds tell knock knock jokes

Karter: knock knock
Me: who's there?
Karter: chicken pot pie
Me: chicken pot pie who?
Karter: max and ruby.
Me: um?

Karter: knock knock
Me: who's there?
Karter: rooster
Me: rooster who?
Karter: rooster chicken pot pie
Me: well that one makes a bit more sense.