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Tie the rope or net across the playing area about 5' above the ground.
This may not be the official set of rules, but is the set we use as it seems to be the one most enjoyed and easiest to referee.
Divide into two teams, one at each end. The ball is hit over the net/rope from the back of court by forming a fist and hitting with the inside of the wrist. The opposing team must attempt to bounce it using fists and arms.
If the ball touches the ground, passes from a team under the net or out of the playing area, the opposing team gains a point if they served, or serve if they did not.
Players may pass to others on the same team an unlimited number of times.
Play is to 21 points, with the teams changing ends once the leading team has reached 11 points.