Hi Michele,
While characters are always subject to change, currently "The Fab 5" - Mickey, Minnie, Donald, Goofy and Pluto are at
Chef Mickey's!
The "make your own sundae" bar is a wonderful treat, isn't it? As much as I would love to tell you that your kids will get to have ice-cream for dessert at breakfast, unfortunately it isn't available then. I didn't remember seeing it open, but I double checked with Guest Relations and they told me the same thing. You may want to switch to a dinner reservation, if your kids have their hearts set on the sundaes.
Another option though, is to visit the Beaches & Cream Soda Shop at
Disney's Beach Club Resort. As a family, you can give the "Kitchen Sink" a try! It includes eight scoops of ice cream, and is served with all the toppings in the shop, plus a whole can of whipping-cream!! Now THAT is a sundae!
Have a Magical vacation,
Kaylene