Hi Elle!
Congratulations on your fist trip to Walt Disney World! Make sure you get a complimentary "My First Visit" button for your daughter when you arrive! If you are only visiting Walt Disney World for one day, I highly suggest Magic Kingdom. The Magic Kingdom park is where Cinderella Castle is located. I suggest making an Advanced Dining Reservation (ADR) at Cinderella's Royal Table (CRT) on the Disney Website or by calling 407-WDW-DINE. At CRT your daughter can actually dine with the princesses in Cinderella Castle!
If your princess wants to be a true princess herself, make a reservation at
Bibbidi Bobbidi Boutique. She can pick a princess hairstyle and you can even choose a package in which she can choose a nail color, princess sash, make-up, tutu and dress. You can check out the different packages and prices on the Disney website.
Also, when you visit Magic Kingdom, go to Fantasyland. She will love the Seven Dwarfs Mine Train, The Magic Flight of Peter Pan and It's a Small World.
She can also meet the princesses, Minnie, Mickey and many other characters while there. You can get her an autograph book and she can collect the signatures. Make sure to take lots of pictures of your daughter's first trip! You will both remember this for a lifetime!
Magically,
Stacy