If you're driving, be sure to have plenty of things to do in the car. We blow bubbles, open a little gift every couple of hours (something from the dollar store), stop at a Play Place half way, etc.
You could go to Bippity Boppity Boutique for princess updo's.
Ask at the Mark Twain to ride up in the wheelhouse.
There is a birthday party celebration at the Plaza Inn (not sure of the cost maybe around $18 a person).
Get birthday buckets.
Ask at the Main Street train station, to ride on the tender.
You can have a birthday cake(s) delivered to a Disney restaurant or hotel room.
Get them those big funky birthday cake candle hats.
My kids wear flashing buttons that read "It's My Birthday"
Have face painting done.
Go to Build a Bear Workshop.
We head straight for Alice in Wonderland first thing (or if we haven't seen Tink in a while, we head there). Then to Autopia, Nemo, IASW, back to Fantasyland for the happiest potty on earth, then Dumbo, Casey Jr., Snow White, Peter Pan, Storybook Canal Boats, that's our order.
Bring baggies to split snacks in the park such as a popcorn or candies.
We make a sit down ressie for one meal a day to regroup, relax and plan our rides.
Have fun!