BaseballGhostMom,
I recall being in a hotel in East Cobb @ PG WWBA, and my son's phone started ringing at 8am on July 1 (the old NCAA date for contact). He got half a dozen calls that day. One school was following up from a junior day (overnight) he attended in the Fall. The other schools he was not familiar with, but he carried on a 10-15 minute conversation with the coaches. He had prepared and rehearsed a 1-2 minute speech for this kind of activity. Mostly, the coaches carried the conversation but he did get his questions in. At the least, this is great practice for your son. Only one of the schools ended up offering, and I'm pretty sure he didn't hear from the other schools again.
So, my son asked questions about:
Have they seen him play, if so where & when, majors, time commitments in the Fall & Spring, tutors and mandatory study halls, athletic dorms, athletic & academic scholarship details, strength training & conditioning philosophy, typical pitching practice, etc...
Good luck!