Organization -  Create four 4 yards squares about 20 yards from each other. Divide teams into groups of 4 or 5 and assign them to a corner.

Game - On the coaches whistle, players one at a time go and retrieve (Round Up) a ground ball and bring it back to their corner. Once all the balls are gone from the middle, players are now free to go get any ball from any corner and bring it back to their corner. Play for a certain amount of time. The team with the most balls wins.