Hi Lili! Thanks for bringing your question to planDisney.
Storytellers Cafe at Disney's Grand Californian Hotel & Spa offers Character Dining with Mickey and his pals at Mickey's Tales of Adventure Breakfast Buffet and Mickey's Tales of Adventure Brunch Buffet. This is a really yummy choice and the setting is beautiful! I think it's a great pick for a special birthday breakfast. However, they won't be able to sit you all at one table, so you'll need to make several smaller reservations at similar times. You might have to play around with how big a group you can book together at a time. Once you arrive, you can explain that you'd like to be seated as close together as possible. It might take a little longer, but the Cast Members will do their best to accommodate you.
Dining reservations typically open up 60 days out, and Character Dining can be a popular choice. It's a lot of fun to meet your favorite Characters while enjoying a delicious meal. So, set a reminder on your mobile device for 60 days out from your preferred date and be ready to check
Storytellers Cafe's reservation availability early that morning.
Since you'll be celebrating a birthday, you should know that a chocolate or vanilla
Mickey Mouse Celebration Cake is available for order at Storytellers Cafe. You can preorder the cake and it will serve 4 to 6 Guests. You'll have the option to add it to your reservation at the time of booking and you can add a birthday greeting. Plus, don't forget a complimentary Celebration Button! Everyone should know a celebration is underway. You can pick up a button at Guest Services at Disney California Adventure Park, City Hall on Main Street, U.S.A. in Disneyland Park, or at a Disneyland Resort Hotel front desk.
Have a magical day.
Elizabeth