Title rated 3.25 out of 5 stars, based on 2 ratings(2 ratings)
Book, 1999
Current format, Book, 1999, U.S. ed. --, All copies in use.
Book, 1999
Current format, Book, 1999, U.S. ed. --, All copies in use. Offered in 0 more formats
Introduces the workings of various kinds of simple machinery with moving parts, such as pulleys, levers, gears, cams, and conveyor belts and provides instructions for building these machines out of cardboard and other easily obtainable materials.
From the community