A prison like dodgeball game
To be the last one to not get sent to prison.
Have 2-3 benches (prison) scattered around the playing area with a specific colour of ball (red) that is the "go to jail" ball. Everyone else is scattered around the gym with other coloured balls spread out to use as shields/blockers. If someone gets hit with a red ball, they must go to prison. The only way they can get out is if someone throws them a bail ball (choose a specific colour- like green) and they catch it while standing on the bench. The game continues until everyone is in prison. Make sure there are boundaries around the jail so the kids have to throw the ball to the prisoners from a decent distance.
If benches aren't available, the leaders can just use hoops to designate the prison area.