Hi Tina,
What a great way to celebrate your twins birthday! Hopefully you've heard of the
Free Admission on Your Birthday promotion, it's something you should be sure to take advantage of.
Based on your group, I would highly recommend
Chef Mickey's at the Contemporary Resort for your breakfast. It is fun, festive and a great way to start a birthday celebration. It's an all you care to eat buffet and generally features Mickey, Goofy, Chip and Dale. I have have great success in booking large parties at this restaurant.
If you're looking to add a birthday dinner as well, I would highly recommend the
Whispering Canyon Cafe at the Wilderness Lodge Resort. It's a whole lot of family fun and I'm sure your entire family would get a kick out of it!
Enjoy your trip, you have a lot of celebrating to do!