you will discover fascinating facts
about the things we use every day.
Gears, gizmos, and gadgets --
and how they are used to operate machines
The invisible forces of electricity and magnetism
The people who invented many
of the things we take for granted
The amazing beam of light called laser --
and how we use it
X-ray machines -- and the way they take pictures
Batteries -- how and why they work
Go on to the How Things Work Project Home Page ...