Houghton Mifflin, 10/1/2016. From Levers to Lasers, Windmills to Wi-Fi, a Visual Guide to the World of Machines. From Builders: Revised and expanded to include lots of "digital age" stuff, this book is my favorite (how does it work) reference for kids ages 9 to 90. Macaulay's explanations are second only.....
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