This Hot Wheels Monster Trucks Color Reveal battle pack features two different Monster Trucks -- Mega Wrex and Race Ace -- in special Color Reveal coating! Inside each barrel drum is one 1:64 scale Hot Wheels Color Reveal Monster Truck and a clip-on water sprayer tank. For the initial reveal, fill the barrel with water, dunk the truck and swirl it around until the water changes color. Pull it out to reveal the Monster Truck and its deco! Want to change its appearance again? Fill the drum with ice cold water and dunk it in to magically change the truck's colors. Instantly change it back by dunking it in warm water. Kids can add Monster Truck-level excitement to the color shifting with head-to-head water battle fill the clip-on water tank with ice cold or warm water and aim to alter the other truck's appearance with each squirt. Repeat the transformations endlessly by alternating between ice cold and warm water. Colors and decorations may vary.