While there is no substitute for an actual game, I believe at the younger groups, games should both enhance the experience for the kids, but also be seen as a tool to measure/evaluate live performance of training.

I think games every 2 weeks would be a sufficient gauge to measure past training and give focus on future training.

That said, many parents pay a lot of money, and I have heard some say things like, "11 games, that's about $100 per game." I am not sure how well it will be received to pay the same amount, or more, for fewer games.