Download or read book Small Inventions that Make a Big Difference written by National Geographic Society (U.S.) and published by . This book was released on 1984-01-01 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes how inventors think and work, explains how one invention--plastic--has changed the world, and briefly discusses seventy-five other important inventions, from the jet engine to the potato chip.