CoachFP: I'd like to bet a Case of Beer! He planned it, we talked about it in practice and not really any practicing involved. It was simple; on his signal (he yelled something out), all girls knew that on Ball 3, they all would start walking to the next base, including the batter.. EVEN coaches didn't pick up on tagging runner from 3B, just griped it was ball 3. They were confused, we all agreed it was ball 3, but ALL runners that advanced STAYED at their bases being it was a live ball and the batter had to come back to the plate.
*** you want to know when you try this? with a batter that you have little confidence in hitting a pitcher. EVERYONE of us has seen a #9 batter (or an experienced batter) that you KNOW your pitcher should beat at the plate, get walked! she gets 2-2 ball to make ball 3, TAKE a chance!
Bush league stuff that can confuse the younger players, but as you face older and better teams it won't work. Same with taking 2nd base on a walk with a runner on 3rd. You can do it at 10U and 12U, but against good teams it's a double play.