The hot wheels colour reveal car set is loaded with awesome surprises for your son. Inside the drum are two colour-revealing cars covered in a special coating. For the initial reveal fill the drum with water and swirl each car around in it until the water changes colour then pull the car out. The sweet decor hiding underneath are exposed. Want to change its appearance again? Fill the drum with ice-cold water and dunk each car in for yet another awesome transformation. Change it back by dunking it in warm water. Repeat this over and over again alternating between warm or ice cold water. The product images are for illustrative purposes only. You will receive a randomly chosen item from the brand.