Hi Debbie,
I would schedule a day and a half to enjoy the Magic Kingdom. This park offers the largest number of attractions that your family can enjoy together, & a variety of shows and character meet and greet opportunities. Fantasyland is a must! Visit Dumbo, It's A Small World and The Many Adventures of Winnie the Pooh, and Peter Pan's Flight. Toontown is where the kids can visit Mickey and Minnie's homes & meet a number of Disney pals. Plan on enjoying the new Move it, Shake It, Celebrate It street party, and of course there is Wishes, which is the perfect ending to a magical day.
I would also spend a day at Hollywood Studios. Must-do's here include the live stage shows with Ariel & Beauty & the Beast, as well as Playhouse Disney & Toy Story Midway Mania, an attraction featuring the Toy Story gang. If you have time, head over to Epcot and visit Innoventions, There are fantastic family activities here that are fun & educational (everything from fire safety to fitness). Another fun activity is creating their own take home mask at the Kidstop areas around the World Showcase. This activity also gives them the chance to interact with Cast Members from all over the world.
Take some time before you arrive to let the kids pick a few things they really want to do. Visit
www.disneyworld.com or
www.allears.net to let them see the various attractions and activities. It is a great idea to schedule at least one character meal. You can enjoy a delicious meal and spend some time with Disney friends.
Remember most importantly, to go at their speed and level. If they become frightened by the characters or an attraction just skip it. If they decide they would rather sit and eat ice cream then watch a show, let them. You and the kids will enjoy the time much more if you enjoy and remember what you accomplish rather than worry about what you missed.