This colorful cake is a delightful surprise for kids. The cake layers are dyed in vibrant rainbow colors, creating a stunning visual effect when sliced. To add an element of surprise, the cake is filled with a hidden layer of colorful candies or sprinkles. The frosting is usually a simple vanilla buttercream, allowing the vibrant colors of the cake to shine through. This cake is not only visually appealing but also a fun treat for kids to enjoy.