We have been there several time for DH's softball tournaments but went one time when we were just down for vacation and there was a NFL experience spot set up, like they do at the all-stars and, I think, Super bowl games. YOu could throw passes for distance/accuracy, tackle, time runs, etc. I know this was not a permenant attraction and don't know if they even have it but you could check w/ Guest Relations to see if anything is going on there.
The often have softball/baseball tournaments and the Braves do spring training there so if you go during that time. You just have to see what is going on when you are there.
Also the cafe is not open all the time so you should check on that too if you are thinking about going for that.