Best friends Arlo and Robby are almost identical in what they wear, what they like, and even where they have teeth missing, but when Robby insists on betting on who is going to lose the next tooth their friendship is endangered., Best friends Arlo and Robby do everything alike. They ride identical bicycles, dress in matching clothes, and even have a missing tooth in the same place. However, when Robby wins a bet over who will lose a tooth next, Arlo is jealous and angry. Is the boy's friendship over forever?
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