Mathamusements Author:Raymund Blum, Jeff Sinclair (Illustrator) Math can be magic! These tricks, puzzles, memory tests, 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 you friend's secret number. Balancing Act shows how you draw half a painting, and the paper creates the other half. Cricket Thermometer tells the corr... more »ect 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 you 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 book and you'll be ready to have fun with numbers.« less