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Inclined Planes (Simple Machines)

Inclined Planes (Simple Machines)

From moving ramps to playground slides, inclined planes are at work all over in our world today. Learn all about them in five easy-to-read chapters. Vibrant, fu...
National Geographic Readers: Robots

National Geographic Readers: Robots

Discover the coolest robots of today and tomorrow in this colorful, photo-packed book. In this inviting and entertaining format, kids will learn about the scien...
National Geographic Readers: Planes

National Geographic Readers: Planes

How cool is a supersonic jet that can zip, dip, and zoom through the air? Or a helicopter that hovers as still as a hummingbird? In this 32-page beginning reade...