The way out of this mess is to base the colored balls on the skill of the player, not the age of the player. I know lots of kids age 6-10 who can beat lots of kids 12-14 years old, yet the younger ones are forced to play with dead balls and the older ones would play with regulation.
Reality: 10 year old advanced players are playing with the green ball, while 12 year old novices are playing regulation. This is what mandates creates. Makes sense?