Million Questions

Kids ask why planes fly, why bridges stand, why lights turn on, and why a zipper zips.

A Million Whys: The Built Expedition answers 150 of those questions in full color. Each page is one question, with a real explanation, a labeled picture, a wow fact, and a short try-this.

Six expeditions:

• Wheels, Wings, and Water

• Power, Light, and Energy

• Buildings and Bridges

• Messages and Machines