Title: Simple Machines
Description: How did the Ancient Egyptians build the pyramids? What is an Archimedes screw? Which wedge do you use every time you eat? 'Do It Yourself' offers an exciting new approach to understanding and investigation. Each book helps you conduct your own experiments and activities to learn more about the world around you.
Subjects: Machinery, Machinery, juvenile literature, Simple machines, Juvenile literature, Experiments