Rubber Ducky's Car Wash is basically a scaled down version of any real-life car wash. The car is placed on the ramp, and as soon as a Lego piece on the moving chain system (tracks) catches onto a wheel of the car the car is pulled along through the car wash. Switches are implanted into the stationary track along which the left wheel of the car is on. These switches are spaced so that each one triggers the start or end of a process. The process that is triggered by the first switch is the bubble-blowing mechanism. This soaps the car. Then the car hits the second switch, which turns the bubble-blowing mechanism off and starts the "misty pumps" which are timed to wet the entire length of the car. The third switch turns on the timed buffers, which buff, polish, and partially dry the car. The fourth switch turns on a set of simple Lego fans, which do not actually dry the car, but create the effect of drying. Finally, the fifth switch triggers a bell to ring to alert you that your car has been fully washed and dried.

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