James, what town are you in? I think a "tagging up" clinic, would take about 5 minutes of my time.
In the local league that I was at, they can't slide in 8U and can't run on a caught fly ball until 12U. The kids just aren't learning the game, because it is dumbed down so much.
I went to a clinic one time and one of the stations involved two adults holding a bar that the girls would run up to and swing under, sliding as they went.(this was indoors) the more they did it, the more they got into it. my DD was one of the heavier girls who didn't run fast and was not light on her feet. she really had fun with it and learned how it felt to do it right so that she could slide under the bar without holding it before the end of the 15 minute station.How do you handle heavy girls that have difficulty learning to slide. Some don't seem to be able to get up enough speed to slide.