Two people stand across from each other, one on the end of the service box and one on the baseline. First you start just throwing the ball to your partner, letting it bounce once on the ground before your partner catches the ball. Next, let your partner throw the ball to you and hit it softly with your racket, back to your partner. Your partner must catch the ball. Repeat 5 times. Then you can throw the ball to your partner and they hit it 5 times. After that, just try to hit it back and forth, letting it bounce once on the ground!