In this riveting TED video, author and theorist Steven Johnson explains how the delight of play has led to some of our most life-changing inventions. He explains how a flute led to music boxes, which led to automated organs, which led to mechanized weaving looms, which led to the modern computer. You won’t ever look at the roots of invention the same way. Keep playing! Not only is it fun, it reduces stress and help your brain grow.