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Simple machine experiments using seesaws, wheels, pulleys, and more : one hour or less science experiments
Simple machine experiments using seesaws, wheels, pulleys, and more : one hour or less science experiments
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Authors
Gardner, Robert, 1929-
Subjects
Machinery--Experiments.
Seesaw.
Wheels.
Pulleys.
Language
English
Series
Last-minute science projects
Dimensions
24 cm.