Text and pictures introduce the wheel, a simple machine used primarily to make it easy to move heavy loads.
- ISBN10 158952439X
- ISBN13 9781589524392
- Publish Date 3 December 2005 (first published 1 December 1997)
- Publish Status Out of Print
- Out of Print 2 July 2021
- Imprint Rourke Publishing (FL)
- Format Hardcover (Library Binding)
- Pages 32
- Language English