Cross the finish line in the fastest car! Any parent and child can build a successful Pinewood DerbyÂ® car with the designs and techniques in this enjoyable book. Derby-winning dads reveal their scout-legal tricks for making faster cars, using ordinary tools that you probably already have at home. With hundreds of color photographs and clear diagrams and illustrations, this essential handbook offers tips for designing your own car, placing the weights, optimizing the wheels, applying a cool paint job, and more. Simple explanations of derby car speed science will inspire you to shave those last tenths of a second off your time and go home with the trophy.