How to use: First, roll the included 1:64 scale Megalodon die - cast monster truck up the ramp and into the Power Wash. Close the Power Wash and spin it to start the wash cycle. You'll see the color of the truck change, revealing a clean design. If you want to make the dirt stains fade, dunk the truck in warm water. To make it dirty again, splash it with ice - cold water. Let the truck roll along the working conveyor belt and through the spinning brushes for a scrub. You can choose to exit through the Dirt Donut Bowl to get it dirty again or race down the slide. You can also use other compatible 1:64 Monster Jam trucks with this set. For more color - changing action, collect the 1:64 2 Packs. Note: The 1:64 2 Packs are sold separately. Maintenance: Keep the set dry when not in use to avoid damage to the mechanical parts like the conveyer belt and the power washer. If there is any dirt on the spinning brushes, you can gently clean them with a soft cloth. Make sure to keep small parts away from very young children to prevent choking hazards.