As children, we spend much of our time in imaginary worlds, substituting toys and make-believe for the real surroundings that we are just beginning to explore and understand. As we play, we learn. And as we grow, our play gets more complicated. We add rules and goals. The result is something we call games. Now an entire generation has grown up with a different set of games than any before it – and it plays these games in different ways. —Will Wright —Dream Machines (Wired)