Hi Charlotte,
Walt Disney World is the perfect place to celebrate birthdays! Sounds like you have an exciting trip coming up.
Be sure to stop at the Guest Services desk at whichever Disney theme park you visit first to let the Cast Members know that you have three people in your party celebrating birthdays. They will give each of the celebrants a birthday button that will garner much attention and many well wishes during their trip. You just never know what special brand of magic might await the wearers of the birthday button!
It sounds like you may want to order a birthday cake for your big celebration. Disney has a cake hotline. Call them at (407) 827-2253. If you give them at least 48 hours notice, they can put together a custom-designed cake made especially for your celebration and they will deliver it to a Disney table service restaurant where you have an advance dining reservation. Another option would be to call room service at your Disney resort and ask them to deliver a birthday cake to your room. That's what my family did when we celebrated my fortieth birthday at Disney's Wilderness Lodge.
While your seven-year-old would probably love to experience
Bibbidi Bobbidi Boutique during her birthday celebration, there's one activity that everyone in your group could enjoy together. Book a fireworks cruise by calling (407) WDW-PLAY. A pontoon boat will whisk your entire group out onto Seven Seas Lagoon in time to watch the Wishes fireworks spectacular above Cinderella Cinderella Castle. Now that's a birthday celebration that no one will ever forget!
Wishing you and your family a truly magical multiple birthday celebration! Thanks for a fun question.
Jill