We live in GA as well. And those are the only ones that I know of. You could try King Chess or Lego JR. Robotics
http://www.usfirst.org/roboticsprograms/jfll/content.aspx?id=13144 wich he can start at 6yrs old if he's into that. If I can think of more, I'll let you know. What kinds of interests does he have? Check out Fernbank, Tellus Musem, and the High Museum for kid classes.
If you were homeschooling, like us, there are some co-ops with higher level learning classes that your DS could be taking.
