The baby is a human in the early stages of life, typically defined as being from birth to around one year old. During this time, babies undergo rapid physical and cognitive development, including gaining weight, learning to crawl, and beginning to communicate through cooing and babbling. Babies require constant care and attention from caregivers, often their parents. They depend on adults for feeding, diaper changes, and comfort. Common items associated with babies include diapers, bottles, and cribs, which help meet their basic needs and ensure a safe environment for growth and exploration.