This article describes a behavioral intervention program for adults with autism, suggests that preparation for adulthood should begin in early childhood, asserts that the curriculum should be just as comprehensive and evaluation criteria just as rigorous in programs for adults as in programs for children, and proposes that close examination of adults' repertoires may lead to key modifications of services delivered to children. Along the way, the authors provide some data on the progress of 15 people who are now adults and whom they have known for 15 to 25 years. Finally, the authors argue that, because of the diversity of skills and skill deficits displayed by adults with autism, a program model that prevents "falling through the cracks" must provide an array of options--from training center to supported employment.