There are many disabled children for whom special aids and adaptations are needed to enable them to lead fuller, more independent lives. During a visit to the White Lodge Childrens Centre, Chertsey, Surrey, I heard, from his teacher, of the problems of a six-year-old boy who attends the Centre. Barry is severely disabled with cerebral palsy and is unable to use any of the currently available mechanisms such as hand operated switches. There is a possibility, however, that he could gain sufficient control of his tongue to operate a small touch sensor if it could be held in position, in relation to his tongue, in such a way that his involuntary movements would not displace the sensor.