Hi there Martha, welcome to planDisney!
Mickey's Holiday Pajama Party Breakfast and Brunch sounds like the perfect way to get into the holiday spirit! Storytellers Cafe at Disney's Grand Californian Hotel & Spa is one of our favorite dining experiences.
It is totally up to you and your family for what you'd like to wear! I'm sure you will see both kids and adults in their favorite holiday pajamas for breakfast and brunch, and your favorite Disney pals will be in their pajamas as well!
If you're looking for some options before your trip, I highly recommend checking out the
Disney Store site, there are a ton of pajama options! You also could do some shopping during your trip, and visit the
Downtown Disney District and the
World of Disney store. World of Disney has a ton of apparel and souvenirs to choose from, it's our favorite place to shop for souvenirs during our trips.
I hope you and your family have a very cozy brunch during your trip, Martha! Don't hesitate to
come back to planDisney with any other questions.
Have a magical day!
Melissa