Bay-Bay.

"I got a baby in my belly, a baby in my belly. My first bay-bay."

Mohawk.

Kenley: "My belly's gonna be full as a mohawk."
Me: "A mohawk?"
*shakes head*
Me: "What's a mohawk?"
Kenley: "When your belly's really full from eatin' lots of dinner."

Hairy Gorilla.

*Kenley punching Daddy's belly*
Daddy: "Do I look like a jelly belly?"
Kenley: "No."
Daddy: "Well what does it look like?"
Kenley: "A hairy gorilla."