The document discusses the development of language in children. It explains that language develops at different rates depending on other skills children are learning as well as how caregivers respond to children's communication attempts. The document also outlines Piaget's stages of cognitive development, including the sensory-motor stage from birth to 2 years, the pre-operational stage from 2 to 7 years, the concrete operational stage from 7 to 11 years, and the formal operational stage from 11 years and up. Finally, it provides tips for caregivers to help support language development such as responding to cries, having conversations, reading books, and describing what the child is doing.