Building a puzzle has never been more fun! This super high speed 100 piece Hot Wheels puzzle brings the action and the fun with the wonderfully magical surprise of color change technology. Fill up the color reveal water pen (comes included!) with water and get your racer ready to reveal the hidden surprise images in the puzzle! Measuring a substantial 15" x 11.25" and made using high quality components, this is a puzzle any Hot Wheels fan will want to do again and again! Perfect for kids ages 4-10.