Frost 4 donuts with chocolate frosting. Press Chocolate Lucky Charms™ in the frosting. Tint half of the vanilla frosting pink. Frost 4 donuts with the plain vanilla frosting and 4 with pink-vanilla frosting. Press Cinnamon Toast Crunch™ into the plain vanilla frosting, and Fruity Cheerios™ into the pink frosted donuts. Allow frosting to firm up before serving.