The document outlines the key stages of speech and language development in children from birth to 3 years. It discusses how newborns can localize sounds and begin to recognize parents by 1-2 months. Between 3-6 months, babies start to hold eye contact, turn toward sounds, and engage in babbling. Between 9-12 months, babbling becomes more complex and babies begin following simple commands. Between 18 months and 2 years, children's vocabularies expand rapidly and they can speak in short phrases and identify family members.