This is one of my favorite [tag]girls softball drills[/tag] that works on a couple of things at the same time…we all like those!   I use this mostly for when I need my players to coach first base. I do this while working with middle school girls (so coaching bases is new to them).

Set up–
Rotate your [tag]softball[/tag] players through coaching and base running.
Players line up at the plate as the batter (just take off running).
One player as base coach and 1st baseman playing her position.
Coach it at mound or somewhere in the close infield to make the throw to 1st.
1st baseman makes the play as usual while the [tag]base coach[/tag] is telling the player to stay or go.
The [tag]softball coach[/tag] can make the throw as easy or difficult as desired to challenge the first baseman.
Base coach is telling runner to go on an overthrown ball.

You can also add scenarios such as a bobbled ball in the outfield, or errors at other bases. This is a good [tag]softball drill[/tag] to start with and it teaches the kids to be vocal while they are coaching 1st and is great work for the first baseman.