The invisible network through which young American girls learn hand-clapping games is fueled by older sisters. The best older sisters from which to learn hand-clapping games are the ones who have recently departed from girlhood to driving. If one does not have an older sister, one must access an older sister through a friend. While it is from older sisters that the games are originally learned, once a game has been introduced to a group of girls it spreads among them like a sickness. If there is rumor of a new hand-clapping game, one must learn it as quickly as possible. If the new game
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