Play therapy is used with children ages 12 and younger. Therapists who are well versed in development and attachment theory observe the child in a safe and comfortable environment and provide space for the child to explore their thoughts and emotions through play. The therapist uses opportunities that arise in play to help children express themselves in healthier and more productive ways. Play therapy is useful for many children, including those experiencing social difficulties, anxiety, depression, learning disabilities, and ADHD, or who are on the Autism spectrum. Play therapy sessions typically occur weekly and treatment may last for several months. Play therapy may be used in conjunction with other types of child therapy.