Hi Marcy!
Oh, don't tell him I said, but your son is NOT too old for Disney! There are SO many great (non-roller coaster) attractions that are not remotely baby-ish. In fact, I think I like Disney World better as an adult! :)
One tip is to get a Disney Guide book (I have The Complete Walt Disney World) and let him look through it, pick out stuff that interests him and let him help you plan the MUST-DOs!
Do you have the
Planning DVD? You can order it for free and there is usually a really fun section for kids his age. That might get him a little excited, too.
I think the best thing for no-whining is to be prepared. Know where you're going and what to expect. You don't need to plan your day down to the minute, but pick some must-sees and make sure those get done. Then everything else will be sugar on top!
If you have any specific questions,
please let me know. I'd love to talk more!