Children’s Physical Activity Drops Between Ages 9-15 How Much Should Children Exercise?
National Institute of Health

Like adults, children should be physically active most, if not all, days of the week. Experts suggest at least 60 minutes of moderate physical activity daily for most children. Walking fast, bicycling, jumping rope, dancing fast, and playing basketball are all good ways for your child to be active.

As children spend more time watching TV and playing computer and video games, they spend less time being active. Parents play a big role in helping kids get up and get moving.