The Jokester

Just a quick story--
Amelia told her first joke this weekend, which really kind of blew me away. It was just so funny how she said it, and I have no idea where she came up with the idea. She's way too smart. Anyway, we were in the car...
She said, "Knock, knock"
So I (of course) said, "Who's there?"
"Mia"
"Mia who?" I asked.
"Mama Mia Mama Mia"
Then she giggled like crazy. And so did JD and I. Pretty clever.