 A number of studies have shown better motor coordination and improved mental well-being, confidence, and resilience in children playing and learning outdoors. For NPR News, I'm Jenny Brandeen in Denver. Crude oil prices trading lower, down about four-tenths of a percent at $81.97 a barrel. U.S. futures contracts are trading higher. I'm Janine Herbst, and you're listening to NPR News from Washington.