My brother, a cub scout leader, has a Pine Derby for his cubs. In addition to making the cars with the kids, he's in charge of the actual Derby, where they race the cars.
He asked me to make some stencils for a pre-Derby activity, so I started by making some sketches.
Pine Derby cars are the ones made with wood and have simply carved or cut shapes. They have four wheels and are powered by their own weight, not a battery or motor.
The next step is creating the stencils that will be just under 9x12 inches.