In this paper, we discuss the output of a student project about the design of a physically interactive system to assist the education of martial arts to children. The conceptual scope of the project included interactions and activities designed into a system of re-configurable devices for both of the major areas of martial arts training: form practice, and sparring. Using micro-controller-based prototyping, we developed a physical, interactive model that can simulate variations of a game designed to help teach controlled sparring between two children. Keywords Martial arts, Tai Chi, instruction, teaching, children, games, toys, micro-controller, interactive prototyping