Howdy William! I imagine that you have enjoyed countless magical memories of your girls over the past years. Fabulous!
There are several ways that you can add some magic and pixie dust to their birthdays.
The Yachtsman Steakhouse is one of our favorites and a wonderful restaurant where you can help celebrate their birthdays. The food is amazing and the service is exceptional!
I would also HIGHLY suggest that you look into
Disney Floral and Gifts and have something delivered to your villa for them...or possibly even surprise them with a delivery before your vacation. The Cast Members at Disney Floral and Gifts will create a gift basket or surprise that will overwhelm your daughters! Possibly some jewelry presented in a beautiful package? Maybe a keepsake or treasure they have wished for in the past? I know a surprise such as this would make their birthdays extra special!
What about some pampering? Have you thought about a spa treatment? Senses - A Disney Spa at Disney's Grand Floridian Resort would be a treat for anyone and you also have the option of the spa at Disney's Saratoga Springs Resort and Spa. Either would be wonderful and Saratoga Springs would be very convenient to you while you are staying at Disney's Old Key West Resort. For more information, you can call (407) WDW-SPAS.
If you need some other potential ideas, please let me know. We are a bit limited on space per question but I would love to continue to help you in your planning if you need any further ideas.
Have a magical magical magical time and I wish both of your girls the happiest of birthday celebrations!! I know they are in their 30s but they will always be your little princesses. Enjoy your time together.
Thanks for your question William! Have a magical day!