In Play, Marc Malmdorf Andersen argues that playing is not just for kids and the young at heart; rather, it is a scientific process. Through tinkering with one hare-brained idea after another, we become better, more creative adults. Malmdorf Andersen charts the evolution of play and evaluates research in developmental psychology and biology that shows how play helps us develop trust and intimacy, solve problems, and explore the world around us.