Hi Bonnie! Welcome to the Disney Parks Moms Panel!
I have a couple of suggestions that will hopefully help you find something for breakfast that works for your family!
My first suggestion is to try booking a
breakfast reservation at one of the Disney Resort hotels on the monorail loop. They are very close to Magic Kingdom Park and offer some absolutely delicious options! Disney's Contemporary Resort has the super popular character breakfast, Chef Mickey's, but this is also the location of
The Wave... of American Flavors that has a buffet breakfast option and an a la carte menu. My family dined there for breakfast on our last vacation and had delicious food, excellent service, and my husband and I enjoyed their mimosas (available for Guests 21-years of age and older). Disney's Polynesian Village Resort is home to Kona Cafe and 'Ohana - both yummy choices. Disney's Grand Floridian Resort & Spa offers 1900 Park Fare and Grand Floridian Cafe. I looked and many of these locations have availability for breakfast on the date you are looking for (depending on your party size)!
My next recommendation is to keep searching for reservations at restaurants in Magic Kingdom Park. Plans change frequently for Guests and reservations do open up. I like to make an Advance Dining Reservation at another restaurant as a back-up plan, then keep searching for the one I really want. I have found many reservations that way. Just make sure you cancel any dining reservations that you no longer need to avoid any cancellation fees (in most cases, you must cancel at least one day in advance).
Enjoy your upcoming trip, Bonnie! Happy eating!
Tabitha