I use a tee, wiffle balls and a 28" long 1" PVC pipe to teach beginners to hit. I have 3 different sizes of wiffle balls, with several different colors. I start with the biggest of the wiffle balls on the tee. I have the girl get into hitting position, with the tee just in front of her front foot, and using the PVC pipe as her bat, touch the pipe to her arm, just below her shoulder. the girl turns, keeping the pipe on her arm, then whips the pipe to the ball. We move to smaller balls as the girls get better, and then for fun, stack the balls like a snowman. This drill teaches the girls to swing without dropping their hands. That rotating the hips and shoulders brings the bat around (not the hands), it keeps the hands in tight (no casting of the hands/bat) and to accelerate the hands through the hitting zone. You can use a full sized bat for this, but the pvc pipe is lighter and doesn't tire them out and teaches them to swing faster.