teams which consist of the boys and girls get into the circle. The
teams are at some distance from each other. The boys and the girls
take their turns in the circle. The leader is in the center of the
circle. They have 2 balls in the hands (a blue one and a red one).
They throw the balls to the players and gets them back. The girls
may catch only the red ball, the boys only the blue one. The leader
tries to confuse the players: he/she may throw 2 balls at once or
pretend that he/she is going to throw the ball in one direction, while
he/she is going to throw it in the opposite one. The player that makes
a mistake is out.