Math, Games, Puzzles, Mathematics 

It all adds up to one thing: math projects that will stretch your mind, tickle your funnybone, and provide hours of pleasure. These fresh and fun hands-on activities are designed to stimulate thinking and put math concepts into practice. Flex your hexagon to produce some magic: just create a paper model that can transform into fifteen symmetrical patterns -- such as stars and cubes -- and 6 different colors. Astound friends with your mind-reading abilities: you need colored papers, special cards that you can photocopy, scissors, and glue. (The trick lies in memorizing one corner number on each card.) It's a challenge, a solitaire challenge, that is. Make this ancient Chinese puzzle out of cardboard or plywood and try constructing different shapes out of the assorted pieces. Also try weighing human hair, adding faster than a calculator, and playing a mind-boggling game, Tic Tac Take Away -- where the object is to force your opponent to take the last marker. Over 30 projects to do! - from Amzon