I used the wilton 11x14 cake cut it in half and sculpt ed it how I wanted it. Then I put the "bad parts" as my 5 yr old calls them on top and iced it all with B/C and the covered it in fondant. The tracks are twizzlers and are held in place with wire. The wheels are mini Oreos. This was a fun cake to make. My hubby helped me with the 50 cal. (whick is the gun on the front) The cannon is a Pepperidge Famr's Pirouette covered in fondant.