Hi Dana, and welcome to the Disney Parks Moms Panel!
I'm so excited about breakfast with Chip 'n' Dale at The Garden Grill restaurant at Epcot! We were able to get a reservation in November for this brand new experience. My son adores those crafty chipmunks, so he's already counting down the days.
All meals at The Garden Grill are served family-style, so your food is brought to you in large serving bowls, allowing you to serve yourself. And if you want more of something, just ask! The family-style-service is all-you-care-to-eat, and your server will be happy to bring you seconds (or thirds) of whatever you like.
As with the other family-style and buffet meals at Walt Disney World, the cost varies depending on the season and day of the week. I've had success calling Disney Dining and asking a Cast Member for the exact price our meal will be on the day of our visit.
I hope this helps you plan a grand celebration for your grandson's big day, Dana! Please come see us again if you have any more questions.
Keep Disney Dreaming,
Kathy K.