What is Sand Tray Therapy? Sand Tray Therapy is a form of expressive therapy. This non-verbal method of therapy is often used with children, but can be applied to adults, teens, couples, families, and groups as well. Sand Tray Therapy allows a client to construct their own microcosm using miniatures and sand. This acts as a reflection of the client’s own life and allows them the opportunity to resolve conflicts, remove obstacles, and increase self acceptance and healing.