muffins, 12 dozen mini muffins- you could do some of those sprinkle-covered pop tarts, not healthy, but very cute for Easter.
bagels, about 5 dozen, split, 30 per pound for the cream cheese, and you need some strawberry jam or some kind of preserves, a couple of large jars.

fruit, do amount similar to the fruit tray for 100 on the fruit tray page- you want just 4-5 bites per person

coffee, do breakfast coffee per the beverage planning page
juice, 1 quart per 8, 4 ounce cups
milk, 1 quart per 4 kids plus some as indicated for coffee on the planning page.

cereal is a real challenge- it's messy to eat, you need milk and spoons. The pre-pack bowls are a possible choice. 60 bowls, kid choice flavors.