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Pre-OrderYoung inventors and researchers are curious, and question everything. How does the staircases light ..
Pre-OrderHow does a cone gear wheel, a belt drive or a rack and pinion drive work? What happens if the gear r..
Pre-OrderLearn about optical phenomena in the classroom and conduct experiments with light! Discover the conc..
Pre-OrderTop Facts:One class set contains 16 individual sets One class set is suitable for, for ..
