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Gears

Part of the Toybox science series
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What are gears used for? In this book children can find out by looking at toys and other objects and then use the blueprint at the end of the book to build their own helicopter.

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Title Unavailable: Out of Print
Product Details
A & C Black Publishers Ltd
0713652292 / 9780713652291
Paperback
621.833
31/08/1999
United Kingdom
English
32p. : ill. (chiefly col.)
23 cm
general /primary Learn More
Reprint. Originally published: 1991.