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Leif Catches the Wind: A Mechanical Engineering Story
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Leif and his cousin Dana are best friends. When Dana moves away, Leif keeps in touch with her via email and soon learns that Dana's new house has a fish pond where the fish seem to be sick. Leif and Dana realize they might be able to use wind energy to solve the problem and ask for help from Leif's mother, a mechanical engineer. Leif and Dana design a windmill to save the fish. Readers are invited to create their own windmills and design blades to make their windmills spin.
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