You will need:
One ball per group.
Students stand in a semicircle around the teacher (or another student). The teacher randomly throws the ball around to the students. If you catch it, you stay standing. If you drop the ball, you go to the bottom of the row (far left of the teacher). It’s about ending up at the top (far right).
The game can be made harder. Students must clap before catching the ball. If they do not clap, or they clap without catching the ball, they go to the bottom of the row.