I think most of the NAR Jr. members are hobbyists, while most of the Wal-Mart kids are just playing with toys. There is no way to quantify the level and numbers of kids involved in rocketry for the NAR puroposes of managing sport rocketry, and nurturing the development of young rocketeers, except perhaps by starting with the number of Jr. members and making a WAG.
The NAR does have several "service programs" that serve nonmembers. The NAR web site is a resource that is open to all. Narts products are available for sale to all. Sport Rocketry is available for all at many hobby stores and book stores. TARC is open to all. Certified motors are available to all. The BATFE lawsuit is a service to all (although HPR user certification remains a gotcha). Many NAR sections have lots of non NAR associat members. Jerry, what more should the NAR be doing for non members?
Alan