Molecules
Players form groups based on a randomly called number, with those who remain standing being eliminated from the game.
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Warmup
Players form groups based on a randomly called number, with those who remain standing being eliminated from the game.
Everybody runs around the room until the game leader shouts a number. Instantly, everybody forms groups with the same number of players as the number that was called out. They put their arms around each other and sit down. Anyone left standing is out of the game. It is amazing that even when it gets hectic, the formation of groups rises.