Is there much I can tell a hall full of teachers and technologists about the power and potential of play? Maybe not. The best I can do in my twenty minutes is to dip briefly into my own musings and researches into this perpetually startling, continually inspiring dimension of human behaviour and culture. And hope that it brightens your perception of your own practice and vocation. I tend to go deep and high with play. Deep into biology, evolution and neuroscience. And high into the broader social, political and global significance of play, as it moves to the centre of our collective agendas.