Where you hold the bat. Grips are typically made of rubber to help absorb the sting when the bat makes contact with the ball.
Kids usually swing metal bats rather than wood. Although they can be more expensive, metal isn't likely to break.
The wide part of the bat that makes contact with the ball. Bigger barrels have larger sweet spots.5-7 8-9 10 11-12 13+ size chart 26 27 28 29 30 31 32+ batting gloves batting helmets balls trainers