Today’s invention is a low-cost radio controlled toy.
Two aerosol cans filled with compressed air have their necks clipped into a control box with steering levers which can be made to press the button on either can (or both).

The resulting jet(s) is directed onto the ground so as to drive the whole vehicle forwards, turning according to the strength of the left or right airflow. The cans can have a couple of loosely fitting cardboard rings attached, so as to make this turning easier.