Well. Outdoor play leaves kids with more advanced motor skills than their “indoor” peers, including coordination, balance and agility. Kids who play outside are more likely to move in ways that challenge their muscles, bones and physical endurance. Children playing outside will encourage independence and build resilience. It will give them a sense of freedom. If we don't force our kids outside, they'll never know what they are missing. Spending time outdoors reduces your symptoms of anxiety and depression. An analysis of ten studies found that spending time in a green environment improved mood and self-esteem. Those struggling with mental illness saw significant increases in their self-esteem and saw a reduction in their depression symptoms