Mathamusements Author:Raymond Blum Math can be magic! — These tricks, puzzles, memory test, and other experiments will get you started. All you need is a pencil, a piece of paper, and a few supplies handy around the house. Guess your friend's secret number. Balancing Act shows how you draw half a painting, adn the paper creates the other half. Cricket Thermometer tells the cor... more »rect time by counting the number of times a cricket chirps in 15 seconds. Or try the dozens of other fun challenges. Draw special straight lines that turn into circles. Get your Favorite Number to show up on a calculator every time. Try Zooming -- taking a favorite cartoon and enlarging it with just a pencil and paper. Grab this boik and you'll be ready to have fun with numbers!« less