We surveyed some editors of National Geographic's international editions to find out how their countries celebrate lost baby teeth. Chew on this: Sometimes the tooth fairy doesn't make it all the way around the world.
Brazil, Greece, Japan
Children toss teeth on the over the roof. In Japan bottom teeth go on the roof and upper teeth are stashed under the floor to encourage the new teeth to grow in straight.
Mexico, Italy, Spain, Turkey, Scandinavia
Children place teeth under pillows at bedtime. The 'fairy' who comes in the night is as quiet as a mouse - because for some it is a mouse that leaves a gift in the tooth's place.
The tooth is wrapped in a piece of cattle fat; then the child gives it to a dog to eat and says, "Please take my tooth and give me a better one."