There’s something incredibly gratifying about swiping your hand across a surface, digging a trough with your fingers, and watching a flowing river come to life before your eyes. These interactive displays use sand as the base medium, allowing you to scoop, smash, and splatter structures that are then analyzed by a Microsoft Kinect and fed to a computer, which then projects a topographical map onto the surface. The result is you feeling like a giant, shaping the world beneath you