How long should kids exercise?

30 minutes daily. Being active as a child is essential for health, healthy growth, and to maintain good health as an adult. Daily activity is important to establish a routine that's easier to stay on - just help you child find an activity that he or she enjoys doing and encourage them to stay with it.
Physical activities. It's more about fitness and staying healthy than just exercise. Kids should be kids and have physical activities for 30minutes to an hour daily. Good luck.