You mean other than gorge yourself on detailing supplies (I can't even imagine the combined breadth of CMA and Autogeek)? Kennedy Space Center is one place, if you are so inclined (not sure how much the tour has been diluted post-9/11). There is also the Air Force Space Museum at Cape Canaveral, which used to be much less "touristy", which used to only be open on Sundays, but now seems to be part of a daily tour, although it looks like you might be limited in the time they let you spend there.
If you want to drive a couple hours north, you can go to Daytona Beach (and drive on it!), see the speedway, etc. There are, of course, the numerous theme parks in the Orlando area, which someone else will be better able to brief you on.