Experiments and activities introduce the basic principles of electricity and magnetism.

Being an engineer -- Levers -- Catapults -- Linking levers -- Pulleys -- Running smoothly -- Belt drive -- Gears -- Gear drawing -- Cams -- Gravity screw -- Archimedes' screw -- Balance -- Pneumatics -- Rocket power -- Wind and water -- Rubber band power -- Moving through air -- Steam engines -- Marble clock -- All kinds of clocks -- Glossary -- Index. Introduces basic facts about the construction and function of simple machines with instructions...

Hands-on experiments introduce such structures as skyscrapers, dams, keystone bridges, igloos, and lock gates and show the materials used, the method of construction, and the source of strength.

Introduces basic facts about the human body with instructions for related experiments and projects.

Experiments and activities explore the world of sound. Suggested level: primary, intermediate.

Clarifies the study of the forces and principles involved with weather through the use of models and associated activities.

Experiments and activities explore the world of sound.

An illustrated book of projects that demonstrate how the universe works.

An illustrated book of projects that demonstrate how the universe works.