MORE AND MORE, WE HEAR about the benefits of exercise for children. Staying active can help prevent childhood obesity, for instance, and ward off future chronic diseases. But exercise is important for children for other reasons too. Aside from the many physical gains that come with keeping kids active, research continues to underscore another key premise: The more a child moves, the sharper he or she tends to be. By participating in regular physical activity, a child will have better concentration, improved memory, greater mental performance and likely more academic achievements.