Examines various simple machines and how they are used to make work easier and provides activities using wheels, levers, pulleys, screws, and more.
Editions · 5
Paperback
1998 · Children's Press
30 pp · EN
9780516207933
Paperback
1998 · Children's Press (CT)
32 pp · EN
9780516263922
Paperback
2000 · Franklin Watts Ltd
32 pp · EN
9780749637712
Hardback
2001 · Tandem Library
EN
9780613374453
Paperback
2007 · Children's Press
30 pp · EN
9780749677756
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