Farm A is for younger players with little or no baseball experience. Farm A players may be Little League ages 6-8 (usually 1st-3rd grade). Coaches pitch to batters in Farm A, but may use a tee after 5 attempts.
Farm AA is for players that are Little League ages 7-10 (usually 2nd-4th grade). Coaches pitch to batters in Farm AA and kid pitching (30 feet) is breifly introduced.