Get your group to stand in a circle all facing the center.
Have them spread out arms length.
One person is in the middle with a ball and passes it back and forth to the other players surrounding them.
The player in the middle with the ball must say “drop it” or “catch it” before tossing the ball to one of the players.
The player then must do the opposite of what is being told to them.
If the player in the center says “drop it”, then the other player must catch it and vice versa. If they do the wrong motion, they must switch places with the person in the middle.