I need someone to go to an actual MLB game, bring up this page on your phone, and tell me if it works.
Steal Predictor
They probably change the indicator every inning, but it would give you something to do while watching the game with a runner on 1st.
http://www.youtube.com/watch?v=PmlRbfSavbI
It will definitely work for your kid games at the local park. I'm just wondering if the MLB people use the same indicators.
Even if the MLB has 3-4 different indicators, they could write something to factor that in. We'll probably see a version of this in the announcer booth.
Instead of the 3rd base coach giving the signs, it will probably be done verbally by the 1st base coach with some code words.