Valerie Bertinelli and Duff Goldman are hosting the ultimate bake sale for the finale. They challenge the remaining three young bakers to create cakes using bake sale items like toffee, rice cereal treats or chocolate-covered pretzels, but the cakes also have to illustrate a common bake sale theme like Drama Club, Dance Club or Chess Club. Only one baker will win $25,000, a spot in Food Network magazine and the title of Kids Baking Champion.