Tip from Keith Blackledge, Heath, Ohio.
The best blocking drill for kids that are learning to block is to start at the net in the proper blocking position. Have coach hold a ball slightly above net line and back. Have the kid jump and reach over the net (Penetration at the net line), grab the ball (both hands to go after the ball), and as she starts to come down, throw the ball behind their head and to the ground. The next step to the drill is to jump up to grab the ball and hold onto the ball as they land. Then immediately jump back up with the ball in their hand and place the ball back into the coaches hand and land again. The next part of the drill would be to introduce footwork from the middle blocker prior to jumping. I would have each kid do the drill at least 5 to 7 times then switch.