Grades 4 to 6.

Includes index.

"Did you know that the first stop signs were black and white? Or that a litter of kittens is called a kindle? There's a lot to know and we bet you'll have fun learning these fun, far-out facts in the next super series from National Geographic Kids! Based on a favorite department in Nat Geo Kids magazine, this book is chock-full of fascinating facts, silly stats, and catchy little knowledge nuggets in all kinds of cool categories, from astronomy and dinosaurs to revolutions and breakfast. Special features include Extreme Weirdness, Strange Places, Wacky World, and more"--Provided by publisher.