At present child development and pediatric rehabilitation is an emerging and challenging research field in the context of potential application and development of socially interactive robots [1]. The research inspired by psychological and pedagogical theories, as well as by recent achievements in robotics and assistive technology, has resulted in a variety of dedicated robots, experimental techniques, and evaluation methods. The robots range from mobile platforms of simple shape to humanoidal dolls [1], [2] and are equipped with a rich set of sensors and actuators. Their behaviours are purely reactive and the corresponding software architecture is based on the behaviour based paradigm.