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Technology is changing art, and fast. Movies are full of computer-rendered graphics, video games are moving toward virtual reality, and even printers are going 3D. And yet, rendering 3D objects generally takes expensive computer programs and specialized knowledge. That's why the Yeehaw Wand is so cool: anyone with a tablet or smartphone can use it to design 3D objects with a process as easy as molding clay. It's basically the real-life version of "Harold and the Purple Crayon."