Three ball exercise:
Take two balls in your right hand and one ball in your left hand. Throw one of the balls from your right hand to your left, and toss the ball in your left hand just as you did in the exercise with the two balls. When this ball reaches its highest point in its arch throw the second ball from your right hand to your left. Now you will have two balls in your left hand and one ball in your right hand.Do the same exercise, except start with your left hand instead of your right.