I remember my competitions we held at the local club between all of the younger kids. It wasn't but about maybe 30 of us split into two age groups, but it was awesome. I can't speak for everyone but the involvement makes me think that it teaches very special habits that stick with you. Me and my dad went to the range every weekend religiously just to practice, but more importantly have fun. He gets mad at me jokingly now when I smoke him, and just tell him its his own fault!
I still have my trophies from over 10 years ago!(yes the name is correct) haha. Encourage your club to start competitions even if they will be small, I loved mine and your kids will too!