Peek-a-what?

This morning playing with the Peanut,

Six: "Peek-a-POOH!" "Peeek-ah-pooh!! PEEK-A-POOOOOH!"

Four: "It's not peek-a-pooh. That would stink. It's peek-a-chu! Pikachu!"

Me: "Actually, it's neither. It's really peek-a-boo!"

(silence------)

Six: "Peek-a-POOOOHHHHH!!! hmm... That's not too stinky."