Boghammar is a type of boat that has a special shape that helps it float on top of the water. It's made out of materials that are light so it doesn't sink, like wood or plastic. The design of this boat is really important because it helps it move faster and more smoothly through the water. It's often used for racing and other types of water sports. Think of it like a really cool and fast boat that you could see in a race or at the beach.