Gross motor control refers to the movements of the large muscles of the body. The development of these skill are important for School Readiness. Children acquire new gross motor skills by practicing a movement or activity until that particular skill is mastered.From birth, a baby starts developing gross motor control, beginning with the control of her head and torso. The development of gross motor control continues until the baby has learned to sit, crawl, stand, walk and then progressed to running, jumping and the range of activities that an adult can do.