how to make a clay boat buoyant
A solid chunk of clay, just like a chunk of steel, fiberglass, aluminum or cement, will sink in water. In order to make clay float, you have to shape it into something wide enough and roughly bowl-shaped so that it can displace enough water to compensate for its mass, just like a real boat.at the clay into an even, rectangular flat sheet. The thinner it is, the more buoyant your boat will be. Fold the ends of the boat together to make an enclosed box. It could be rectangular or shaped like a canoe, as long as it has sides that are higher than the bottom. Pinch the ends together to get a tight seal.