Physical development During the first three years of life, humans transition from complete physical dependence to independence with a majority of basic self-help and mobility skills. While the exact timeline differs from child to child, all new-borns share a gradually progression and development as they age from infants into young children. Babies learn how to control their muscles and movements. Motor control develops from the head, moves down through the arms and the trunk and then to the legs and feet, according to an item on early development on the online magazine Parenting. At first, children's movements are reflexive in nature -- for example, turning their head to the side when you stroke their cheek. As motor development continues, babies will learn to interact with their environment.
Your child will seem to leap from milestone to milestone during his first year. From birth to 4 weeks, he'll glance at your face. From 1 to 3 months, his attention span will increase, he'll coo, and he'll smile when he sees your face. Between 3 and 6 months, he'll vocalize some sounds, and he'll start saying "mama" or "dada" between 6 and 9 months. From 9 to 12 months, he'll understand basic commands and imitate sounds. During his second year, your child will begin sorting things by shape and colour, according to the Centres for Disease Control and Prevention. She will be able to find objects even when they're hidden under something. She should use several words by 18 months and several phrases by 2 years. She'll also recognize the name for many people and objects. From 2 to 3 years, your child will be able to avoid some hazards to keep him safe. He will be fascinated by learning and will often