Humans have searched out fun for centuries - chariot races, dueling crickets, roller coasters, Rubik's Cubes. It seems we've always had a knack for finding interesting ways to have a good time. Of course, it wasn’t always that way. Our earliest ancestors had to worry more about survival than finding something to do in their free time. But as we evolved and daily living got a little easier, we began to think a bit more about entertainment. It started simply, with storytelling by a fire. Soon it grew into activities like banquets, spectator sports, theater and fairs, to name just a few. Today huge theme parks attract thrill-seekers and people step into virtual worlds for fun. And that’s just scratching the surface. With things like virtual reality, fidget spinners and global phenomena like Pokémon Go, who knows what the future of fun will hold!
Find out why leaves turn orange, yellow, red, and purple in the autumn before falling to the ground. Additional features to aid comprehension include colorful images, informational diagrams, hands-on activities, detailed captions and callouts, a table of contents, a phonetic glossary, sources for further research, and an introduction to the author.
Find out what causes spring, summer, fall, and winter and how different parts of Earth experience the seasons. Additional features to aid comprehension include colorful images, informational diagrams, hands-on activities, detailed captions and callouts, a table of contents, a phonetic glossary, sources for further research, and an introduction to the author.
Find out how the atmosphere makes the sky look blue during the day and orange and red at sunrise and sunset. Additional features to aid comprehension include colorful images, informational diagrams, hands-on activities, detailed captions and callouts, a table of contents, a phonetic glossary, sources for further research, and an introduction to the author.
Find out how clouds and fog are formed and how they are alike and different. Additional features to aid comprehension include colorful images, informational diagrams, hands-on activities, detailed captions and callouts, a table of contents, a phonetic glossary, sources for further research, and an introduction to the author.
Find out how the water cycle causes rain, snow, sleet, and other types of precipitation. Additional features to aid comprehension include colorful images, informational diagrams, hands-on activities, detailed captions and callouts, a table of contents, a phonetic glossary, sources for further research, and an introduction to the author.
Find out how the movement of Earth causes the first day of summer and the first day of winter. Additional features to aid comprehension include colorful images, informational diagrams, hands-on activities, detailed captions and callouts, a table of contents, a phonetic glossary, sources for further research, and an introduction to the author.
Find out how raindrops in the air bend sunlight to turn it into a colorful rainbow. Additional features to aid comprehension include colorful images, informational diagrams, hands-on activities, detailed captions and callouts, a table of contents, a phonetic glossary, sources for further research, and an introduction to the author.
Provides information about volcanoes, how they form, where they are, how they erupt, the damage they can cause, and the ways we can monitor them.
What can scientists learn from an ancient fossil of two dinosaurs locked in battle? Plenty! One of those dinosaurs was a Velociraptor, a 'quick thief' and predator of the Cretaceous period. Like the scientists who study Velociraptor, young readers will discover how much eighty-million-year-old bones still have to say! Additional features to enhance comprehension include informative sidebars, a glossary of key words and phrases, sources for further research, a Did-You-Know section, and an overview of the geologic time scale.
When you think of dinosaurs, do you think of ferocious meat-eaters terrorizing everything around them? If so, you were probably imagining the Tyrannosaurus Rex, the 'tyrant lizard' of its time. But if you think you know everything there is to know about T. Rex, think again! Learn about the many sides of this mighty dinosaur. Additional features to enhance comprehension include informative sidebars, a glossary of key words and phrases, sources for further research, a Did-You-Know section, and an overview of the geologic time scale.
In 1888, scientists searching for dinosaur bones found an enormous head like none they had ever seen before. They named it Triceratops, meaning 'three-horned face.' As they discovered more bones, they learned more and more about this 'new' dinosaur. With this book, you too can go back in time millions of years to explore the world of Triceratops. Additional features to enhance comprehension include informative sidebars, a glossary of key words and phrases, sources for further research, a Did-You-Know section, and an overview of the geologic time scale.
Trains are used to carry everything from cargo and animals to people. But how do trains move? Who drives them? Learn more about these important machines inside.
Whether they're being used to plow fields or push dirt and snow, tractors are important machines. Get the basics on these useful machines inside.
How are tow trucks used? What are the special parts of a tow truck? How do tow trucks work? Learn more about these important trucks inside.
Examines tornadoes, their causes, where they occur, their characteristics, and the effects they produce.
Provides advice for smart and safe Internet use, including safe searching and safe use of social media, and explores the role of the Internet in modern life.
Learn how sedimentary, igneous, and metamorphic rocks form, break apart, and change over time. Additional features to aid comprehension include fact-filled captions and sidebars, detailed photographs, infographics or informational diagrams, a table of contents, a phonetic glossary, sources for further research, and an introduction to the author.
Compelling narrative nonfiction text presents the story of the Mars rovers, featuring the intrigue and excitement behind the missions. Additional features to aid comprehension include a table of contents, fact-filled captions and callouts, infographics, a glossary, a listing of source notes, sources for further research, and an introduction to the author.
Gives readers a behind-the-scenes look at the invention of the cotton gin. Additional features include a table of contents, a Fast Facts spread, critical-thinking questions, primary source quotes and accompanying source notes, a phonetic glossary, an index, and sources for further research.
Gives readers a behind-the-scenes look at the invention of the transistor. Additional features include a table of contents, a Fast Facts spread, critical-thinking questions, primary source quotes and accompanying source notes, a phonetic glossary, an index, and sources for further research.
Gives readers a behind-the-scenes look at the invention of the atomic bomb. Additional features include a table of contents, a Fast Facts spread, critical-thinking questions, primary source quotes and accompanying source notes, a phonetic glossary, an index, and sources for further research.
Gives readers a behind-the-scenes look at the invention of the airplane. Additional features include a table of contents, a Fast Facts spread, critical-thinking questions, primary source quotes and accompanying source notes, a phonetic glossary, an index, and sources for further research.
Gives readers a behind-the-scenes look at the invention of the assembly line. Additional features include a table of contents, a Fast Facts spread, critical-thinking questions, primary source quotes and accompanying source notes, a phonetic glossary, an index, and sources for further research.
Compelling narrative nonfiction text presents the story of the International Space Station, featuring the intrigue and excitement behind the mission. Additional features to aid comprehension include a table of contents, fact-filled captions and callouts, infographics, a glossary, a listing of source notes, sources for further research, and an introduction to the author.
