We were surprised to hear that parents — both low-income and upper-income — were focusing on traditional ‘academics’ (letters, numbers, colors) instead of outdoor play, even for children as young as 3 years old,” Copeland said. “Children learn on the playground — they learn about nature, weather and the seasons, motion, concepts of distance and speed, and cause and effect. They learn how to negotiate and talk with their peers. And they learn fundamental gross motor skills, like how to throw and catch a ball, and how to skip.