We celebrated our DD's 10th birthday in The World too! We had tickets for
MNSSHP that night, so we went to Beaches and Cream for lunch, took her to the Grand Floridian Spa for her first Mani/Pedi (we gave her the choice of that or BBB, and she opted for the m/p), and then we went to MK, had an early dinner at CRT, and then on to the party! It was magical! My Lucy wore her Olaf costume from her dance recital and so many people asked her to take a picture with them! She even was cheered for right before the parade as some thought she was part of the parade! It was so funny! (My avatar is from that day). I love the suggestion above of the dessert party! And the m/p that we did at the spa was a lot of fun too.
As for dinners, Via Napoli was a lot if fun, and the Italian waiters came and sang to our DD (this was the same birthday trip, just a few days earlier). We did a breakfast at Akershus, and Snow White brought Lucy a cupcake that was "from" Anna and Elsa, with "apologies" from them for not being able to be there to help her celebrate! It was super sweet! At CRT on her actual birthday, we ordered a chocolate slipper filled with mousse, with happy birthday written on it. She loved that!
And 1900 Park Fare is a lot of fun at dinner. The stepmother and stepsisters are amazing and so funny!
When is your DD's birthday? I'm sure whatever you do she will love it!