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I just came across this amazing video which is described as a “Rube Goldberg machine with a twist.” Be sure and listen to it with your volume turned on as the sound and the visual component are both important. I immediately thought of the STEM [Science, Technology, Engineering, and Mathematics ] Workshop I led for early childhood teachers in Washington DC in June. Although Melvin the Machine, which includes a fire sequence, is obviously wildly more complex and daring than the teacher’s inventions, the delicate engineering plays with the same basic concepts of motion, speed and cause and effect. Check out this video.