By three to four months of age, most babies placed on their tummies on a safe, warm surface push down with their arms and raise their chests, so that they can turn their heads to look about at the world around them. By five months, babies stretch both feet and hands upward in order to swipe at interesting mobiles placed overhead. At seven to nine months, babies placed on the floor will push up both arms and legs and rock back and forth as if doing preliminary exercises in preparation for their first efforts at learning to creep or crawl across a floor. By 10 to 13 months, that baby will push up to standing, holding on firmly to the couch, even if wobbly. In this article, the author discusses how toddlers are learning their exhilarating new locomotion skills to coordinate several bodily motions at once. She emphasizes how music combined with movement help in babies' physical development. The author presents some activities to try to foster babies' physical development.