Hi Marissa,
I know just the place for your little one to meet the princesses and fairies! I can't guarantee that she will meet them all, but I can give you a few tips for your quest.
First of all, Tinkerbell and her friends are currently greeting guests at
Tinkerbell's Magical Nook in Adventureland near Aloha Isle. The different fairies available may vary depending on the day, but most likely, Tink will be there each day. Next is the Princess meet and greet in Town Square Theater just inside the main entrance to Magic Kingdom near Tony's Town Square on Main Street, USA. The lineup of princesses will vary day to day, but there are usually 2 to 3 different princesses there at a time. Tiana and Prince Naveen are currently greeting guests in Tiana's Garden Glen in Liberty Square.
Another great spot to see different princesses is in Epcot. For example, you can sometimes find Snow White in Germany, Mulan in China, and Belle in France. It is always fun to see them in their "native" settings.
As always, characters are subject to change without notice, so be sure to check a times guide in each park as well as downloading a very useful and free
mobile app called My Disney Experience. This app can give you up-to-the minute locations and times for the characters throughout the parks. It is also very useful for its other amazing features like official wait times at the attractions!
May your princess' dreams come true meeting all her favorites.
~Allison L