Gear up! :
Good, Keith.
Gear up! : marvelous machine projects. Keith Good. - Minneapolis : Lerner Publications, 1999. - 30 pages : color illustrations ; 27 cm. - Design it! .
Includes index
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.
0822535661 (lib. bdg. : alk. paper)
99036678
Simple machines--Juvenile literature.
Simple machines.
TJ 147 / .G591 1999
Gear up! : marvelous machine projects. Keith Good. - Minneapolis : Lerner Publications, 1999. - 30 pages : color illustrations ; 27 cm. - Design it! .
Includes index
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.
0822535661 (lib. bdg. : alk. paper)
99036678
Simple machines--Juvenile literature.
Simple machines.
TJ 147 / .G591 1999
