With preschool and elementary age girls, usually the princess themed meals are a big hit. The classic princess meal would be breakfast or lunch at Cinderella's Royal Table. These reservations are particularly difficult to come by, so if you can't get in there, good alternatives would be the Princess Storybook meals in the Norway pavilion at Epcot or the dinner at 1900 Park Fare at the Grand Floridian.
Beyond that, I'd make your decision based on which characters your children enjoy. For example, if Winnie the Pooh is on your radar, then the Crystal Palace at the Magic Kingdom is a must do. Or if your girls like Donald Duck, then I'd go for the Tusker House in the Animal Kingdom.
Another factor in your decision would be which parks you are touring and where you are staying. If you have some free time planned at Epcot, then the Garden Grill meal with Mickey, Goofy, and the chipmunks would be great. (An additional cool factor about this meal is that entire restaurant spins while you're dining!) If you're staying at the Yacht or Beach Club, I'd give the Cape May Cafe a try.
If you click
here, you'll find a link to all your character dining options. If I were in your shoes, I'd narrow it down to two or three choices and then get your girls involved in helping make the final decision.
Hope you have a great trip!