This title is suitable for children of ages 7 to 8 years. Pulleys help make up some of the most complicated machinery, from car engines to cranes. See how pulleys lift and move heavy things, how pulleys work together, and the different kinds of pulleys. Kids get to use their own pulleys in the fun with pulleys section.
This is Book 11 in the Simple Machines Series. See all Simple Machines books here.
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The second book in a fabulous new magical, middle-grade series filled with adventure, wonder and wildness,
