* What keeps an upside-down roller coaster on track? How does wing shape lift an airplane? Help your kids explore over 20 different types of engineering---mechanical, chemical, electrical---and their uses all around us! Featuring 25 fun projects, this hands-on resource provides step-by-step instructions, lists of easy-to-find materials, and simple scientific explanations of each activity. 205 pages, softcover from Jossey-Bass.