<prompt> A normal child will acquire complete neck control by8 weeks16 weeks28 weeks24 weeks  <response>: GROSS MOTOR DEVELOPMENT:2 months: Holds head in the plane of rest of the body when held in ventral suspension. In the prone position in bed, the chin lifts momentarily.3 months: lift head above the plane of the body. Head control starts by 3 months and fully developed by 5 months.4 months: Remain on forearm support if put in prone position, lifting the upper part of the body off the bed.5 months: Rolls over.6 months: sit in a tripod fashion.8 months: sits without support., crawling9 months: Takes a few steps with one hand held. Pulls to standing and cruises holding on to furniture by 10 months. 10 months: creeps12 months: creeps well, walk but falls, stand without support.15 months: walks well, walks backward sideways pulling a toy. May crawl upstairs.18 months: Runs, walks upstairs with one hand held. Explores drawers2 years: walk up and downstairs, jumps.3 years: rides tricycle, alternate feet going upstairs.4 years: hops on one foot, alternate feet going downstairs.5 years: skips 