"Definitely a significant contribution to the field. There are few books that contain both interesting experiments and their physical explanations--most leave them somewhat mysterious, with no logical solutions. Being among those special few, this book will be of interest to general readers with inquiring minds."--Ronald D. Edge, University of South Carolina "Downie writes well--with clear, crisp prose, and with a sense of humor I find delightful."--Paul J. Nahin, University of New Hampshire "The most important aspect of this book is that it allows the reader to come up with non-intuitive practical results. Why make a toy that does something predictable? Why invest time in something that everybody else expects? But if you learn how to do something that will impress your friends, then you will do it."--Florin Diacu, University of VictoriaDownie, Neil A. is the author of 'Vacuum Bazookas, Electric Rainbow Jelly, and 27 Other Saturday Science Projects', published 2001 under ISBN 9780691009865 and ISBN 0691009864.