Well ... as I don't know their tastes, here are the things that aren't considered "fast rides." They can pick and choose from there.
At MK ... Peter Pan, Winnie the Pooh, Haunted Mansion, Country Bears, Tomorrowland Transit Authority, Snow White, Pirates of the Caribbean, Small World, Tiki Birds, Jungle Cruise, Philharmagic, Hall of Presidents
At Epcot ... Spaceship Earth, Imagination, Living Seas, Universe of Energy, The Land, Honey I Shrunk the Audience, movies in China and Canada and France (if they're ok standing for 30 mins), Mexico boat ride, American Adventure
At the Studios ... Great Movie Ride, Little Mermaid, Backlot Tour, Indiana Jones, Beauty & the Beast, MuppetVision, Millionaire
At DAK ... Kilamanjaro Safari, Tough to be a Bug, Legend of the Lion King, Flights of Wonder