Three children with autism attending a school for young children with developmental disabilities participated in this study. These participants were selected according to the following predetermined criteria: (a) a chronological age between 2 and 6 years of age (b) a formal diagnosis of autistic disorder based upon the DSM-IV-TR (American Psychiatric
Association, 2000), and (c) having stereotypic behavior that involved toys (e.g., waving toys in front of face) and a dearth of recognizable appropriate play skills. The first three children referred to the study met all the above criteria and were included. All the participants who began the study completed the study.