[Rog]

re: "what i meant is a caged in area something like a batting cage"

Many Little League locals tried this solution; but, kids were still wandering unattended and getting wacked!
So, the Little League program opted to ban on-deck; and, on field batting cages.

It is amazing how many times I have seen kids in the Seniors division and up start swinging a bat without looking around, or kids wandering around without any thought given to the player swinging a bat.

I even had a high school player step into the box and start doing full swings and each time stepping backward to the point where he just missed my face - on his last swing!
Then again, maybe he was trying to tell me something...