Gross motor skills include standing, walking, going up and down stairs, running, swimming, and other activities that use the large muscles of the arms, legs, and torso. We develop these mostly during childhood through play and physical activity.
Fine motor skills, on the other hand, involve the muscles of the fingers, hands, and wrists, and, to a lesser extent, toes, feet, and ankles. Coordination of hand, eye, and brain makes gaining these skills a little more complex than, for example, learning to crawl. Development of these skills is more ongoing, often throughout our whole lives.