You can do a few inexpensive things to make your trip even more special...
I am going to PM about how to order a signed card prior to your trip.
Also, we order an Elsa gift card from
Disney Store and had the private message be from Elsa - I am so excited to meet you, etc. You could do it from all the princesses and say that you can't wait to meet her at the castle. She can use the $$$ to buy something of her choice during the trip.
Target, Old Navy, Marshalls, and even Dollar Tree have cute Disney things to make a care package for the travel day - coloring books, candy, etc. You could put a princess nightgown, toothbrush, band aids for blisters, lip gloss, etc. We are driving so I bought a couple Disney CDs for the drive
Some people to "Tinkerbell gifts" each day - google that for more info - but it little treats rewarding good behavior and may correlate to each day. I got my daughter an inexpensive Cinderella mirror from Target for the day we go to BBB & CRT, etc. You can also get glow sticks, etc from the Target dollar bin for the parades. Bubbles, etc.
The regular tea at the Grand Floridian gets great reviews and may be worth a look. I know another person mentioned it too. It seems so girlie. The Grand Floridian has Cinderella's carriage too.
Good luck and have fun!