Lots of bean bags, large ropes to create circle boundaries.
Make two equal size circles 50 feet apart.
Divide the group into two equal teams, and have them face each other behind their circles.
Place an equal number of bean bags in each teams circle.
On “GO” both teams run forward. Each player takes 1 bean bag from his circle and puts it in the opposing team’s circle. Players run back and forth continuing to empty bean bags into the opponents’ circle. On “STOP” the team having the least number of bean bags in its circle wins.