Imagine guessing someone's age with just three simple questions, totaling up any five shopping items faster than a calculator, or changing the color of a toothbrush in a flash. You can--with these colorful math challenges. All you need are some readily available materials, a sense of fun, and the desire to experiment. Do instant calculations and mind reading, vanishing tricks and illusions, precision measuring without instruments, and solitaire pastimes. Create beauty with circles and flexagons--and make a terrific paperweight with a tetrahedron! With just a little patience and effort, you'll meet every one of these challenges. 80 pages (all in color), 8 1/2 x 10. NEW IN PAPERBACK
