It is never too soon to develop young players' swing mechanics. Reggie Smith, a 17 year Major Leaguer, big league batting instructor, US Olympic Team Hitting coach and owner of two baseball academies in Florida and California has worked with X Bats to develop this effective training tool. The RS Backspin flat sided training bats are designed to teach proper palm up palm down hand position. This eliminates hitting the ball with topspin or reducing the time the bat is in the hitting zone, by encouraging a smooth path through the hitting zone. You'll know that your hands are in the correct position when the ball comes off the round side of the bat (not the flat side) just light a regular bat.
Use the RS Backspin Youth Training Bat for both tee and short toss drills as well as live batting practice to exaggerate the proper palm up palm down hand position. Checkout Reggie's video explaining the proper use of this bat.