Remote Control Stunt Car Spray For Kids Birthday & Christmas GiftsSpray Drift Four wheeled Stunt Car: There is a mist exhaust system at the rear of the remote control car, whereby simply adding some tap water into the storage hole on the car, it will produce an exhaust cloud of vapour. Combined with the red lights, the tail spray is as cool as a rocket booster. You can also control the switch of the spray separately.