Baseball requires more protective equipment than many sports. To play baseball, each team needs baseballs, bats, batting helmets, and bases, and each player, of course, needs a glove.
Since 2007, Little League Baseball® and Little League Softball® have
mandated the use by all leagues of bases that disengage their anchor
(e.g. "safety-release bases"). If your child is playing for another baseball or softball
national organization you may want to check with them, as this rule
pertains only to Little League Baseball® and Little League Softball®.
Regardless of the youth baseball program in which your child participates, make sure it uses breakaway bases. If they don't, do your best to encourage their use, since a large percentage of baseball injuries occur during sliding and can be prevented by use of safety-release bases.
Each player should have his or her own glove and should take the time to find one that is comfortable and fits well. Players, especially younger ones, should choose a smaller rather than larger glove, because a larger glove is more difficult to open and close quickly.
Bats must be made completely from either wood or aluminum. Older, more competitive teams/leagues may not permit the use of aluminum but, until recently, this was fairly rare until the players reached the collegiate level.
A regulation ball is 9 inches around and weighs approximately 5 ounces. Many leagues use safety or "RIF" (reduced injury factor) baseballs, at least in T-ball and the lower "minor" leagues. Because safety baseballs are softer than regular youth baseballs, they don't hurt as much when they hit a player.