What's the Big Idea?: Inventions that Changed Life on Earth Forever

This lively book by an award-winning author brings to life the history of human innovation for young readers. What's the Big Idea? focuses on those inventions that help fulfill people's six basic needs: food, sleep, security, shelter, companionship, and good health. Main spreads feature a specific invention such as the wheel and axle, paper, bicycles, or the Internet. Each one starts with a "What’s the Big Idea?" box that explains the problem the inventors were trying to solve. It answers the pertinent questions: Why this invention and why now? "Fast Facts" and "Big Ideas" sidebars give young readers quick blasts of information reference-style. Twelve special spreads scattered throughout the book highlight either a famous inventor or a specific theme.