Basketball For Coaches (http://www.basketballforcoaches.com/) is a good resource on everything from practice drills, offensive plays, offensive and defensive philosophies, etc.  There is a lot of information on this website, some of which is age specific.  A couple of articles below deal directly with youth basketball and tactics that are good and bad for the development of young players.  Take the time to read these articles and look around the website for good ideas that you can use in your practice and games to help your kids develop as players. 


Zone Defense is Terrible for Youth Basketball



How to Win Every Youth Basketball Game (8 Terrible Tactics)