As Natalie was bounding down the stairs three at a time I said, "Natalie, be careful. That's dangerous."
And from her: "I know Mommy, but I want to be dangerous."
I told Natalie she could plug in the lights for the Christmas tree. As she clambered over our basket of Christmas books I told her to be careful and to please not break anything.
She pretended to see some words somewhere on the basket and read them to me: "This says 'if you break this it will be fun. And then you can rebuild it.'"