Play therapy is a mental health intervention that uses play to help children communicate and learn to solve problems and change negative behaviors. Play therapy can involve the entire family. Play is natural and important for child development, as it helps children develop physically, socially, emotionally, and cognitively. There are different stages of play as children develop, from unoccupied behavior in infants to cooperative play in older children. Play therapy provides a playroom with toys, art materials, books, and other resources to facilitate play.