Amazon.com description: Product Description: The Formula for Building and Racing PineCars was written especially for young racers. This book is the first in its field to give you step-by-step instructions that include designing, cutting, shaping, painting and adding details to your derby race car. It also devotes an entire section to Speed and Racing. This section gives detailed information on how factors such as shape, weight, and axle polishing can be used to get the most speed out of your racer. The Speed Tips included will give you the winning edge at your race.