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Learn how gears can easily reduce or increase speed, change Force, or transfer motion from one position to another. Build 8 working models, including an experimental crane, a gearbox, a carousel, a hand drill, a helicopter, a hand blender, a rotating sign post and a high speed fan. A 36 page activity book is included with innovative experiments and detailed explanations of the different technological principles applied! A booklet with detailed building instructions is also included.

$ 47.50

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