Description This book celebrates the humble bicycle--from the very first boneshakers to the sleek racing bikes of today, from handlebars to spokes to gear sprockets--and shows you why and how bikes can make the world a better place. Not only can bikes be used to power computers and generators, they can also reduce pollution, promote wellness, and get a package across a crowded city--fast! Informative, but not didactic, this book encourages young readers to be a part of the joy of cycling.