Hi Caryn!
I too have a 3 year old princess and she is just as much a Disney fanatic as I am! I would recommend that you make her an appointment at the
Bibbidi Bobbidi Boutique! Here she will get the royal treatment with a princess makeover!
While at Magic Kingdom, be sure to visit some of the attractions my little one loves: "Peter Pan's Flight", "Buzz Lightyear's Space Ranger Spin", the "Magic Carpets of Aladdin", "It’s a Small World”, and "Dumbo the Flying Elephant". You can also find plenty of
character meet and greets thoughout this park! There is no better feeling than to see your kids light up with excitement when they see their favorite characters! Ultimately, I gotta say that the best thing is the Wishes Nighttime Spectacular Fireworks! The music, the fireworks and the flying Tinker Bell are out of this world!
If you visit the other parks, I would recommend "The Seas with Nemo and Friends" at Epcot and "The Boneyard" play area at Disney's Animal Kingdom; “Disney Junior – Live on Stage!” and "Toy Story Midway Mania" at Disney's Hollywood Studios! Your kids would love these!
If I can help you with any other planning questions, please feel free to ask me!
Thank you for submitting your question to the Disney Parks Moms Panel!
Yael