The fort on Fourth Street : a story about the six simple machines
Building a fort in the backyard, a grandfather and granddaughter get help from six simple machines: lever, pulley, inclined plane, wheel and axle, screw, and wedge.
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| Format: | BOOK |
| Other Format: | EBOOK EAUDIO EBOOK |
| Language: | ENGLISH |
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Sylvan Dell Publishing
2013
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