On the left side, about 1.5 meters, of the net, line up half the players with a racket and small soft ball facing the opponent on the other side of the net.
The opponents is the other half of the group each standing in a starting position; a hoop.
With a tray, which they hold with two hands, they try to catch the ball that the group plays from the other side with the racket over the net.
The catchers may step out of the hoop to catch/intercept the ball.