Give 20 kids 20 balls and sit back and watch. then 10 minutes later take away 10 balls. let them teach other how to share. then 10 minutes later take away 8 balls and let them learn how to compete and share for success.. repeat as needed no parents or coaches allowed except for safety reasons.

Let them learn on their own. They can do it. They want to do it. Mistakes, failure, and figuring things out on their own is paramount for future success in life and sports.