Hi Stephanie!
Disney always brings out the kid in all of us! Or at least they try really hard :-)
I've seen the toughest guys get all "giddy" once they get to Disney. For me, I look for any excuse to act like I'm 5 again, Disney is the best (and one of the few) places I can actually get away with it!
OK, so he's not a big thrill ride seeker. Does he like games? If so, Buzz Lightyear's Space Ranger Spin (Magic Kingdom) and Toy Story Mania (Hollywood Studios) are very fun rides (games I would say) where you can run the score up!
Tomorrowland Speedway is a moderate paced race car ride, not like the ultra fast (and sharp turning) Test Track at Epcot.
The Stunt Show at Epcot, Kilimanjaro Safari at Animal Kingdom are both really fun, and something I think he could enjoy. If he's into science, Innoventions and Imagination Pavilion at Epcot should be cool for him as well.
If all else fails, if he's a golfer, Disney does have very nice golf courses he can take a trip to. Of course, we don't want him spending too much time away from you guys, so use that as the last resort.
Best Regards! May you, family, and especially the husband have a fun, "bring-out-the-kid-in-him" Disney time!!