My daughter has stayed with the same group of girls for several years. If that were to fall apart, I wouldn't hesitate for her to try out for an Explosive team. Honestly, any organization is only as good as the coaches it gets. If you have good coaches, your teams are going to thrive. In your situation, though, putting 6 year olds on a 10 year old team just doesn't sound like a good plan, regardless of how good the little ones are. I have a 6 year old and she's a tough little player, but she is in no way ready for travel even though she's been around the ball fields her entire life.