This is one in a series of four books that i ntroduces children to simple, ...More
This series develops children's knowledge of the basic principles of design...More
Each book introduces a particular simple machine and then explores how it i...More
A clear and easily-understood introduction to simple machines, this text sh...More
A clear and straightforward introduction to the science and technology of m...More
Get to Know Levers Levers play an important part in all our lives! Without ...More
This book is suitable for ages 7 to 8 years. Pulleys help make up some of t...More
Get to Know Wedges Wedges are used to separate, lift, or hold things in pla...More
This book is suitable for ages 7 to 8 years. Read all about wheels and axle...More
Learn about how a screw works! Beginner readers and budding young scientist...More
Learn about how a wedge works! Beginner readers and budding young scientist...More
Learn about how a pulley works! Beginner readers and budding young scientis...More
Learn about how a wheel and axle works! Beginner readers and budding young ...More
Learn all about simple machines! From wedges, wheels and axles, and screws ...More
