The Difference Between Green and Gray.Why place so much emphasis on a daily "green" hour?
A 2001 study, released by University of Illinois, found that a daily dose of Mother Nature helped children with attention deficit disorders. It found that children with Attention Deficit Hyperactivity Disorder (ADHD) could focus better, listen and follow instructions after spending time in parks, around farms or even in verdant backyards. It didn't seem to matter much what they actually did outside so much as they were just spending time in green spaces. By comparison, children who spent time in concrete (or gray) spaces did not experience appreciable benefits or reductions of ADHD symptoms.
There is something about spending time in nature that refreshes people and, in the case of ADHD kids, may also reduce their need for medication and other therapies. To lean more about the study check out:
http://www.herl.uiuc.edu/IMAGES/2-pager%20K&C.htmGreen beats gray any day of the week when it comes to kids' health.