One player is the leader or the 'simon' and orders the other players to make motions by saying "Simon says" and then an action. For example they might say "Simon says thumbs up", "Simon says hands on your head" or "Simon says jump up and down." The leader also makes all of these motions. If he omits the "Simon says" part, however, and just orders "Thumbs up" or "Jump up and down", the players must not make the motion. Anyone who does so is out of the game. The winner is the player who remains in the game the longest.