Speech therapy sessions involve activities used to improve a child's language, articulation and swallowing development. Speech therapists may use a variety of toys, books, photo cards, music, etc. to stimulate communication and therefore increase developmentally appropriate language skills. Therapists improve articulation skills by modeling correct sound production and showing children how to move their mouth and tongue appropriately for understandable speech sounds. To improve communication in children that do not yet have speech to communicate wants or needs, therapists might use repetitive exercises, visual supports, awareness activities, as well as sign language and assistive devices to give these children a way to communicate with others. Speech therapy is also responsible for improving strength and coordination for oral motor functioning to ensure swallowing safety and improve feeding abilities.