MK is my 13-year-old son's favorite park and my 17-year-old's second favorite park (Epcot is his favorite. For record, MK also is the favorite of DH, 7-year-old and me). They are not too keen on Fantasyland but love the rest of it. I always drag them to Fantasyland at least once, though, and both usually choose to do most of the attractions (17-year-old puts his foot down about a couple of things). If this is their first trip, I would even take them to Fantasyland, though. Ditto for ToonTown -- the one place we spend almost no time. Although they would put them in somewhat different order, their favorite attractions at MK are Splash Mountain (13-year-old's favorite), Big Thunder Mountain, Space Mountain (17-year-old's favorite), SpectroMagic and Buzz Lightyear. They are perfectly fine with Pirates, Haunted Mansion, the train (we use as transportation), Tomorrowland Transit Authority, Carosel of Progress, Jungle Cruise, race cars, even Aladdin (but not Dumbo) and Astro-Orbiter. Both think Alien Encounter is dumb, but some kids like it. I think my 13-year-old likes some of the things that he pretends he's too cool to do -- he pretends he's just doing them b/c his little brother wants him to. Don't suggest to your kids that MK might not be cool. You may find that they will love things at WDW that they wouldn't do if their friends were around.