Physical therapy is therapeutic service designed to address gross motor delays in children due to decreased range of motion, abnormal muscle tone, abnormal movement patterns, and orthopedic abnormalities. The main focus of physical therapy is to increase stability and mobility in large muscle groups. Physical therapy initially focuses on building postural stability, then on building mobility. Physical therapists make sure the building blocks of strength, joint range, muscle firing sequences, and motor planning are present so that a child can build upon those skills to promote more normalized patterns of physical development. Therapeutic sessions focus on balance exercises, range of motion, positioning, mobility skills, family training, adaptive equipment, and/or orthotic monitoring (if applicable). Physical therapy cannot make a child master a skill sooner than he/she is able to, but it can help provide opportunities for children to develop and practice the components of a skill as a basis for functional mobility.