My 12 year old son made this cake for our town festival cake contest this weekend. We had 8 different cakes going and his was the last one and was sort of a rush job. He was waiting for me to make piping gel for the first time, and it didnt work out, so he was scrammbling to throw a game plan B together. It was good enough to get 3rd place but we were a little disappointed that he couldnt do what he wanted to. The seaweed is fondant, the coral is royal icing, the rocks are nerds and colored goldfish.