Abstract: A balance board for exercise and amusement having a gyrating and rocking user platform. The balance board simulates the sensation of sports, such as, for example surfing, skiing, etc. The device is constructed of two principle components, namely, a base having a half semi-bulbous shape having a larger dimension at one end tapered toward the other end with a curvilinear smooth outer surface and a generally planar user support platform forming an upper surface of and attached to the base. The user support platform is angled slightly upwardly at one end. The base can be constructed of a smooth plastic or the like and the user platform of plastic, wood or the like with a non-slip user outer surface covering.