The Etch-a-Sketch. A standard bearer for childhood, and one that most of us never really mastered. While Yelizaveta Lokshina can't help you create awe-inspiring portraits from aluminum powder, she has managed to update the toy for the digital age. Using an Arduino, a few buttons and a pressure sensor crammed inside a hollowed-out Etch-a-Sketch, the 3.0 version of the doodler is able to draw in old school gray, as well as vibrant colors created by blending an RGB palette. While holding down the red, green or blue button you squeeze the pressure sensor to add more or less of individual hues. The same sensor is used to ch
