I have been talking about making this rainbow cake for about a year. Finally, I made the cake with my two oldest kids this weekend. It is just two boxes of cake mix, food coloring (the wilton tints) and some homemade frosting (you could do the store-bought frosting but it actually costs more $ to get the same amount of homemade frosting). My lucky co-workers will be getting about half of this cake. I have more fun making them than eating them.