Experimental Fun with the Yo-Yo and Other Science Projects by Al G. Renner (1979)
$7.99
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Hardcover with DJ in Good (G) condition. DJ shows definite wear, rubbing, edge wear. Pages are clean and straight. Binding tight. Presents science experiments based on a yo-yo, wind wagon, cork sailboat, inverted tumbler, Cartesian diver, and hang glider which the experimenter makes himself and then changes as he tests scientific data.
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