Open Registration was AYSO's first philosophy. The founders of AYSO were concerned that many soccer programs did not let all kids play soccer -- many programs required tryouts or other qualifications before kids could get on a team. AYSO wants as many kids as possible to learn the joys of the beautiful game of soccer. AYSO lets all kids register, regardless of ability.
AYSO has a special program called VIP (for Very Important Player) that lets kids with mental or physical challenges play soccer when it would otherwise be too difficult for them in the regular AYSO program.