Play Therapy.

Play therapy is a form of counseling or psychotherapy that therapeutically engages the power of play to communicate with and help people, especially children. It's used to establish an interpersonal process where play therapists use the therapeutic powers of play to help clients prevent or resolve psychosocial challenges and achieve optimal growth and development. It is often used to diagnose, which they do by observing a client playing with toys to determine the cause of the disturbed behavior. The objects and patterns of play as well as the willingness to interact with the therapist can be used to understand the underlying rationale for behavior both inside and outside the session.