Underwater scene for a 5th birthday

This cake was ordered for a little boy's 5th birthday. I love the bright colors on this cake. The cake is a 10 inch round and they ordered an additional 30 cupcakes. The cake is decorated as an underwater scene and the mom is going to be placing a Sponge Bob figurine on top of the cake. Cake is white sourcream with chocolate mousse filling. The cupcakes are chocolate sourcream. The shells and letters are chocolate and the sand is made from graham crackers and crystal sugar. The additonal cupcakes were iced blue with chocolate shells on top.