“Play is the expression of our creativity, and creativity, I believe, is at the very root of our ability to learn, to cope, and to become whatever we may be.” —Fred "Mister" Rogers Can play change the world? It can certainly change us—and the science backs it. Ball Project didn’t begin with a white paper or a lab study. It wasn’t inspired by the grandeur of the Olympics or the World Cup. It started with something smaller and truer: noticing how two or three kids sharing a bal