"Mommy," my four year old daughter said, "what is that thing?"
"What thing?" I said.
"THAT thing." She said. "That thing over there that looks like a moon on top of a little chimney that doesn't have a house under it."
"What do you think it is?" I said.
"I think it's where the flower fairies live. They sleep there during the day and at night they sneak out and make flowers when no one is looking."
(I didn't have the heart to tell her it was just a light fixture.)