10" and 6" square cakes covered in Michele Foster's fondant. Sponge Bob and other characters made of modeling chocolate and mixed with a little gumpaste and some had fondant, too. Other decorations made of modeling chocolate and fondant. Seaweed was fondant. Sign was solid modeling chocolate. Sand was made from a mix of brown sugar and graham cracker crumbs. Super fun cake to make...very time consuming, though, with all the details! Thank you so much to Frenchy77 for your inspiration on this cake! Loved yours!