Discover the importance of the lever and its crucial role in history from ancient civilizations to the modern day; perfect for fans of The Highlights Book of How and The New Way Things Work, by David Macaulay.
Think a lever is just a plank of wood? Think again! Levers have been used to hunt mammoths, raise the Great Wall, and even defend the Crown Jewels. This Mighty Models title highlights ten important key moments in which the lever leveled up in history--from being a spear-thrower to a robotic arm. Plus, readers build their own working catapult using the included build-it-yourself model to see the power of the lever in action! Christine Van Zandt's nonfiction STEM book, ideal for readers 5 to 8 and up, captures the marvels of early machinery in an engaging, interactive, and innovative format for budding engineers, historians, and scientists.外文書商品之書封，為出版社提供之樣本。實際出貨商品，以出版社所提供之現有版本為主。部份書籍，因出版社供應狀況特殊，匯率將依實際狀況做調整。
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