Hellobee Boards

Waffles (put out whipped cream and fruits for toppings)
Pancakes (put out syrup/butter and toppings)
Fruit salad or kebabs
Maybe just two trays, one with bacon/sausage, one with scrambled eggs to make it easy
Then juices/coffee

If you want to go fancy you can do a make your own yogurt parfait/acai bowl or whatever else bar, or do a crockpot of oatmeal with toppings?

Bagels
Quiche
fruit salad

I would try to limit what I made at the time of the party, like making waffles to order. I might make them ahead and reheat them on a sheet pan in the oven, but IMO those things are best right off the grill.

I'd do a big breakfast casserole with eggs and all the breakfasty stuff in it - there's a lot of recipes online for breakfast casseroles done in the crockpot and some people just like a heartier breakfast.

Then I'd do storebought pastries. Kroger or most nicer grocery stores do a kringle-danish-coffee cake thing that is always really good and people enjoy them. Mini muffins of different kinds for kids. Or you can make a tower of mini donuts, throw on some sprinkles, and call it the "birthday cake."

Fruit salad. Can be assembled the night before.

Some means of having a lot of coffee at once.

Juice boxes for the kids. Orange juice (and champers?) for adults.

I'm planning a breakfast party for my DD's party this year. That pioneer women french toast is so good, I make it every Christmas and will for the party. I will also be making some quiche, fruit salad, and buy a bunch of donuts.

Bagels
Donuts
Egg cups (mini egg cups in tins)
Fruit/yogurt

@bubblegum: french toast sticks and fun shaped waffles. Also a yogurt bar with granola and fruit toppings

@bubblegum: This is what we did when DS turned two this fall! We had fruit, pastries, bagels, lox, cream cheese, a frittata, coffee, bloody marys, mimosas, and for the kids - home made funfetti pancakes! DS had a candle in his.