Thomas the Tank Engine was such a great learning experience. He was made from several 8X8 square cakes and some small loaf pans and just all kinds of pieces of cake. At this point I had not found gel color and did not have the determination to make this stuff as dark as it should have been. Still the cake turned out to be a huge success for this mom! The cookie wheels and the crumbled cookie coal were just the topping on the cake.