Hi there from one Amanda to another!
I am Mom to a 5 year old myself, and I can speak from experience when I say that you'll discover LOTS to keep her occupied! The best place to start is at the
Walt Disney World Attractions web site. Once there, Look for the drop down tab on the left titled, "Recommended Ages." Choose the "Kids" box and the results will be filtered to show attractions and entertainment best suited for little ones!
For a more in depth look at these attractions, I recommended visiting Amazon to purchase a guidebook such as,
Birnbaum's Walt Disney World for Kids, or
Beyond the Attractions: A Guide to Walt Disney World With Preschoolers, which targets children ages 2-5! I have personally found both of these publications invaluable to my trip planning!
If you have any specific questions about certain attractions, or any question at all, please feel free to shoot me a question! As mom to a 5 year old, I am beyond happy to help!
Best Wishes,
Amanda F.