Does something serious happen when we play? In this episode, TED speakers describe how all forms of amusement — tossing a ball to video games — can make us smarter, saner and more collaborative. Guests include psychologist Jeffrey Mogil, comedian Charlie Todd, psychiatrist Stuart Brown, primatologist Isabel Behncke Izquierdo and game designer Jane McGonigal. (Original broadcast date: March 27, 2015)