Thanks for the quick reply. Maybe I am selling these guys short too early.
At pre-high school (7th / 8th grade) and possibly freshman, I'm thinking that we should go over some typical "agility" drills, then suggest that those who want to be better baseball players work on these things at home.
Meanwhile, we'll spend quality practice time on fundamentals of the game.
I'm a newbie at this level, but absolutely love baseball.