Describes the basic science principles and the history behind many inventions including the trebuchet, the parachute, spectacles or eyeglasses, the water closet or toilet, the printing press, the cannon, the watch, a microscope, the thermometer, and the battery. Includes hands-on problem solving and make-and-do projects.
Table of Contents
How can I capture the town? How can I jump safely? How can I see more clearly? How can I get rid of waste? How can I print many books? How can I break down walls? How can I tell the time anywhere? How can I see tiny objects clearly? What is the temperature? How can I store electricity?