"You be the mama kitty."
"Okay. I'm the mama kitty. Meow!"
"I'll be the baby kitty. Meow!"
This goes on for a while. Then: "You're an anthropomorphic kitty."
"What does that mean?"
"You're a kitty shaped like a person."
"What if I were a person shaped like a kitty?"
"Cat-a-po-morphic!"