Just found where I jotted down a conversation between the kids when I was in the next room. It made me laugh again reading it.

(watching TV)
JACK
"That's Thomas."

ELLIE
"That's not Thomas."

JACK
"It IS Thomas."

ELLIE (patiently)
"No, Thomas has a "1" on his belly."

JACK
pause
"Oh."

(a minute later)

JACK
"I pooted!"

ELLIE
"You pooted!"

JACK
"I pooted! I pooted!"

ELLIE
"Excuse me, I burped."

JACK
"You pooted, not burped."