This is the age when children begin to effectively combine motor skills like running to kick a ball, rolling after landing from a jump or traveling in rhythm to music. They continue to be enthusiastic about physical activity in all of its forms, especially when the sport or physical activity is structured so that they can be successful. During this year, youngsters who have spent a substantial amount of time outside of school on skills like riding a bike, swimming, skiing, dance or gymnastics begin to show true proficiency. Note: During this period of development, children's actual skill levels will vary based on their amount of physical activity. Sedentary children will not mature as quickly as those who participate in activities like dance lessons, team sports or backyard play.