Are you absolutely sure she won't go on any rides? Not even Small World? What about Carousel of Progress? There are so many slow-moving, scenic rides at Disney. This includes Pooh, Snow White, Haunted Mansion, Living with the Land, Energy, the Mexico boat ride, the Great Movie Ride and Imagination. Just a little bit more adventuresome are Tomorrowland Transit Authority, Buzz Lightyear, Jungle Cruise, Spaceship Earth, the safari, Maalstrom and the backstage tour at MGM. There actually are more in that category than in the thrill ride category. Also, unless her health precludes riding in a truck, I'm sure she would enjoy the safari in AK at least.
And then there's all the Disney attractions that aren't shows at all -- parades, fireworks, Hall of Presidents, Country Bears, Indiana Jones, the new car stunt show, The American Adventure, the wonderful entertainment in each country in Epcot and movies in France, Canada and China.