Briefly introduces children to simple machines and the scientific method, and includes four simple experiments that help readers explore simple machines.
Photographs and text introduce scientific concepts related to simple machines, describing the tools used to build ancient civilizations, and providing additional facts, statistics, and a time line of the simple tools used throughout history.
Explains the science of how screws work, discussing real-life examples such as nuts and bolts, corkscrews, faucets, and tunnel borers, and includes activities that illustrate the principles covered.
Explains the science of how levers work, discussing real-life examples such as openers, bridges, oars, and brakes, and includes activities that illustrate the principles covered.
Explains the science of how ramps and wedges work, discussing real-life examples such as scissors, zippers, slides, and ski jumps, and includes activities that illustrate the principles covered.
A photographic introduction towheels and axles for beginning readers, explaining what they are and how they work, looking at examples of wheels and axles, and discussing their use in complex machines.
A photographic introduction to wedges for beginning readers, explaining what wedges are and how they work, looking at examples of wedges, and discussing the use of wedges in complex machines.
