Susan E. Williams is the Pediatric Occupational Therapist for the borough of Haringey, London, at St. Ann’s Hospital, Child Development Center, St. Ann’s Road, London, England. At the time this article was written, she was Occupational Therapy Director, Shriners Hospital for Crippled Children, Chicago, Illinois

Donald V. Matesi, MS, is a biomedical engineer at Shriners Hospital for Crippled Children, Biomedical Engineering Department, 2211 North Oak Park Avenue, Chicago, Illinois 60635