Sailing

The kid made a paper boat at daycare today, complete with her name on the hull. As I am putting it into her backpack she asks, "Can I take that in the tub?"

"Um, no. I don't think so."

"Why not?"

"It is made out of paper. It will fall apart. It needs to be made of something that won't sink."

"Of course! I forgot it has to be made of metal!"