You can use lighter density foam board (or other matenals) to make the boat body and connect our module to it to ensure that it can float on water.. The clyde puffer is a small steamboat which provided provisions and trade link around the west coast and hebrides islands of scotland. these small cargo ships where made popular by the short stories about the vital spark and her captain para handy.. This is one fun boat. i’m floored with how fast this moves with a 3s lipo. this was well worth adding to any rc collection. i will tell you my boys were excited to see this boat fly out of the water when i punched it..