Hi Alison!
There are so many amazing rides, shows, and meet-and-greets to choose from that make this question really hard to answer! There are awesome experiences in each of the parks, so you really can't go wrong.
At Magic Kingdom Park, I highly suggest going to Fantasyland and riding Peter Pan's Flight, Under the Sea ~ Journey of The Little Mermaid, and "it's a small world." All of these are slow moving attractions that are great for kids and the kid in all of us! I also highly recommend going to see Walt Disney's Enchanted Tiki Room and, one of my family's favorites, the Country Bear Jamboree. With a little pixie dust, your girls can even be transformed into princesses at Bibbidi Bobbidi Boutique!
In Epcot,
Frozen fans will love riding Frozen Ever After. You can also visit The Seas with Nemo & Friends and Turtle Talk With Crush where you can interact with Crush and other characters from
Finding Nemo and
Finding Dory while learning about the beauty of our oceans. You can even see real manatees and other sea creatures in the aquarium!
At Disney's Animal Kingdom, you can ride Kilimanjaro Safaris to see exotic animals in their natural habitats and take the Wildlife Express Train to Affection Section, an open-air petting zoo.
Lastly, at Disney's Hollywood Studios, you can see all of your favorite Muppet characters at Muppet*Vision 3D and watch the Beast's Castle come alive at Beauty and the Beast - Live on Stage. You can even sing along with Anna and Elsa in For the First Time in Forever: A Frozen Sing-Along Celebration!
There are many more magical attractions to experience, so feel free to check out the
complete list of attractions for yourself!
Have a Great Big Beautiful Tomorrow!
-Lindsey N.