Anthony T. DeBenedet, M.D. is a practicing physician, behavioral-science enthusiast, and energetic dad. His interviews and writings on play, health, wellness, and behavior have appeared in multiple major media outlets. He is the author of Playful Intelligence: The Power of Living Lightly in a Serious World. He lives in Ann Arbor, Michigan.
 
Lawrence Cohen, Ph.D. is a licensed psychologist, author, and consultant living in Portland, Oregon. He is a regular contributor to Psychology Today and the author of The Opposite of Worry, a book for parents about childhood anxiety and fears, and Playful Parenting, an award-winning book about nurturing close connections, solving behavior problems, and encouraging children's confidence. He specializes in children's play and play therapy.