Players pair up and position on the court as follows:
– one pair at each of the doubles alleys facing each other (one player on the singles line, one on the doubles line, on the same side of the net). If there are more kids, pair them at the net (one player on each side of the net).
Every player has one ball in their hands (two balls per pair), no racquets are involved in this drill.

Drill:
​​​​​​​At a command, the pairs start to shuffle sideways, in the same direction while tossing the balls back and forth to each other at the same time.
If they drop a ball, they pick it up and continue.
Once the players get to the end of the line, they reverse direction and shuffle back to where they started, while continuing to toss the balls back and forth.
Repeat three times.

Note: Very good drill for developing hand-eye coordination.  It can be used as a warm-up as well.