Looking at pulleys and gears, this is one of of a series which aims to develop children's knowledge of the basic principles of design and technology. Each book introduces a particular principle and explores how it is used in different gadgets and machines.
- ISBN10 0431062730
- ISBN13 9780431062730
- Publish Date 15 January 1997
- Publish Status Out of Print
- Out of Print 9 November 2004
- Publish Country GB
- Publisher Capstone Global Library Ltd
- Imprint Raintree
- Format Paperback
- Pages 24
- Language English