"Mommy," my seven-year-old son said, "I made a blueprint for a jet pack that would fly a million people!" He waved a notebook paper with scribbley lines and stick figures on it in front of me.
"Really? Tell me about it," I said.
"You need 10 metal poles, 641 wooden planks, 10 plastic sticks, and a rope. See - the poles fit together and the rope ties here."
"It's as big as a playground, that's why it can hold a million people."
"Oh, and I forgot one more important thing."
"The smiley face sticker that goes right in the middle!"