Fresh air is healthy .
When children and adults spend a long time together in indoor spaces that are small, overheated and poorly ventilated, germs and illnesses pass easily from one person to another. In fresh, outdoor air, children do not have to rebreathe the germs of the group, and the chance for spreading infection is reduced. Outdoor play is healthy even in winter . Children of all ages enjoy and benefit from playing outdoors in all except the most extreme weather. Daily outdoor play is healthy and burns energy.