\u3cp\u3eIn this paper we describe preliminary results of our work on designing innovative sport concepts to stimulate children's physical play. We are exploring how embedding sensor and actuator technology in products can stimulate children to practice sport related skills. It incorporates ideas from game design, persuasive technology and sport motivation theories. We illustrate our approach with two case studies, in the context of football and basketball and discuss our experiences with embedding sensor technology to provide a motivating play experience for children.\u3c/p\u3