Museum education and art therapy collaborations have emerged to work together to achieve simultaneous education and therapeutic goals for adolescent populations (Peacock, 2012). There is a need for research in the area of improving the services and quality of lives of individuals with Autism Spectrum Disorders (ASD). This study explored the responses of adolescents with high functioning autism (HFA) as they engaged in therapeutic art experiences in the museum setting. Four adolescents ages 13--17 participated in two hour-long sessions twice weekly over the course of ten weeks. They created thematic exhibitions with artist statements that were displayed in a university-based art museum in an exhibition titled My Own Expression. A thematic analysis identified four themes that emerged to describe the therapeutic benefits of utilizing the museum as a space for art therapy sessions with this population. Participant responses indicated four areas of development that occurred across the cases: cognitive and language development, adolescent identity development, socioemotional development, and sensory and affect regulation development. Keywords: art therapy, art museum education, high functioning autism (HFA), joint attention, cognitive and language development, socioemotional development, sensory regulation.