Directions for a Soapbox Car

Build the foundation. Build the outer walls and base large enough that the driver can sit comfortably inside. The driver will need to operate certain steering systems with his feet, so the driver must have enough room for at least minor mobility.

Attach wheels and turning mechanism. These wheels will be larger than the front wheels. How elaborate the wheel and axle system will be is up to the individual driver and crew, but the steering will be mostly accomplished by the front wheels. One option is to use a wooden block steering pedal. Use a piece of wood approximately 2 by 4 inches, and connect the block inside the car to the front axle. Steering will be controlled by the driver's feet by pushing the side of the block opposite the direction she wishes to turn.

Install brakes and extra safety precautions. Make sure to follow your plans exactly on this step as ineffective brakes can put the driver at great risk. Hand brakes and pedal brakes are two common types of braking systems; both can be used alone or simultaneously. Adding foam around the driver's seating area can be a good safety method should something go wrong. Seat belts should also be installed.

Add weight. The maximum weight of a soapbox car (including the driver) is 200 pounds, so the crew has the option of installing extra weight to try to speed up the car. The weight can consist of wood or metal and must be bolted into the base of the vehicle.

Add signage. Every Soap Box car must display its International Soap Box Derby number, national sponsor and local sponsor during competition. The car must also have the logo of the International Soap Box Derby. Drivers may also decorate their vehicles with other sponsors and the name of the driver.