Hi there, Jodi!
Welcome to planDisney! Character dining is such a perfect way to celebrate a little Mouseketeer, I'm so excited for your son's big day!
I did a little research and I do see that
Plaza Inn does not have reservations open for breakfast on June 15, 2024, at the moment. The website does not say that Plaza Inn is closed that day, so I would keep checking for reservations! It's possible that Minnie and her pals are cooking up something special in the kitchen for that weekend (it is Father's Day after all) so hopefully we'll see some reservations open for breakfast soon. It does not look like dining packages will be offered that day, so watching for breakfast is your best bet.
As an alternative, you could always have breakfast at
Goofy's Kitchen at the Disneyland Hotel or at
Storyteller's Cafe with Mickey at Disney's Grand Californian Hotel and Spa! You don't have to be a hotel guest to make reservations and enjoy these delicious meals with our friends. After breakfast, it's just a short walk to the parks! Both of those locations are taking reservations now for June 15, 2024.
You can always find Mickey and the gang enjoying their delightful neighborhood!
Mickey's Toontown is full of interactive experiences, bright colors, and hysterical jokes. It's a great place for little Mouseketeers to explore, splash, and play! Make sure you ask a Cast Member at Guest Relations for a complimentary celebration button so that everyone can wish your son a "Happy Birthday!" during your visit.
I hope that the breakfast reservations open soon, Jodi, and that you have an unforgettable day celebrating with your son.
Keep moving forward!
Amanda