There is no better way to learn robotics and engineering than building and programming your own robots. Potent Printables has shared a video that shows what it takes to build a 3D printed robot that can change its shape to crawl under doors.
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Arduino Robot: 3D Printed and Minority Report Inspired, Highlights
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The robot changes its height to move under narrow openings. It can also negotiate uneven terrain. The robot is driven by Arduino.
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