"Are we going to eat my pumpkin?" said Lily. [After all, that's always what we did with pumpkins in Tanzania.]
"Nope, we're going to carve them," I said. "We will put faces on them."
"Why?" said Lily.
"Because it's fun!"
Oh, the wonders of American tradition through the eyes of a four-year-old.
You're right, Lily, it doesn't really make sense. But doggone it, you're going to experience the fun things we do in America.