Hi Christina,
It sounds like you daughter is going to have a magical birthday celebration!
If you happen to be traveling before May 20, I suggest spending the day in Epcot. The
International Flower and Garden Festival runs from March 7 - May 20. This special event is filled with fun activities and displays for children: Pixie Hollow Fairy Garden, Bambi's Butterfly House, the Backyard Play Garden, and more. Last year there was even a Tangled display with Rapunzel's house.
Princesses can also be found in Epcot's World Showcase. Just about every country features a princess: Mulan in China, Snow White in Germany, Sleeping Beauty in France, and Jasmine in Morocco.
I know you are already going to Cinderella's Royal Table, but 1900 Park Fare in the Grand Floridian has a wonderful character dinner featuring the characters from Cinderella. My daughter fell in love with Prince Charming.
Another fun princess indulgence is
My Disney Girl's Perfectly Princess Tea Party. Guests receive the royal treatment during this special tea party filled with storytelling, songs, and a visit from Princess Aurora or another royal visitor. Each guest receives a My Disney Girl doll dressed in a Princess Aurora gown. It really is a magical experience.
Hope this helps. Have a magical vacation!