The rubber-band car has a finish with a non-toxic mineral oil rated for food contact. This is a child-safe finish that preserves the natural wood feel of the simply designed and sturdy toy.
Hook the rubber-band on the knob on the dowel between the back wheels. Turn the wheels backwards to tighten the rubber-band. So the rubber-band doesn't come unwound, hold the wheels and car to set down on the floor. Let go and watch it take off!