Kickboard is the necessary learning assist for the swimming beginner. It helps the beginners to float easily and reduce the fear toward the water. However, it will also reduce the outcome if the learner relies on the board too much. B-Board is the kickboard that you can adjust the level of buoyancy. The buoyancy can be adjusted through the water inserted. A coach can adjust the buoyancy based on leaner’s level and refer to the sign on the board to let the learner learn the swimming styles gradually. Using B-Board can help one to learn swimming faster and reduce the dependence on the kickboard, providing a friendly learning experience.