This book is suitable for ages 7 to 8 years. Pulleys help make up some of the most complicated machinery, from car engines to cranes. You can see how pulleys lift and move heavy things, how pulleys work together, and the different kinds of pulleys. Kids get to use their own pulleys in the fun with pulleys section.

 

This book features in the following series: Get To Know Simple Machines, Simple Machines .

There are 32 pages in this book. This book was published 2009 by Crabtree Publishing Co, Canada .