"Look, Mom," Emma (almost 9) said as she balanced a children's step stool on her head.
"Very good!" I told her.
"Do you know why I can do that so well?"
"OK, feel the top of your head. See how it's rounded? Now feel the top of mine."
"Wow, Emma, that's flatter than mine."
"I know," Emma said oozing wisdom,"it's cuz I put stuff on my head all the time. But don't worry, it's not going to get flat as a pancake. It's as flat as it's gonna get."