Functional posture problems and related gait problems are often difficult to manage clinically because of the difficulty of providing immediate feedback to clients during walking or standing and because of secondary personal gains provided the client for having the "disability." This article describes an inexpensive posture training device and treatment of a client with developmental disabilities and a long history of posture problems and secondary gait pattern abnormalities. Thirty-six short training sessions, coupled with a supportive daily living situation, produced marked improvements in the client's posture and gait.