Gym class drill: fopball

All players must stand in a circle facing the middle.
There stands the game leader with a ball.
All players have their hands behind their backs.
When the leader of the game throws the ball to you, you have to catch it.
When you catch the ball, you can take your hands behind your back.
When you don't catch the ball, you are out of the circle.
If the person in charge of the game tricks you into throwing the ball, you are not allowed to take your hands behind your back.
If you do so, you are out.

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Minimum number of players

Maximum number of players

Balls