Here's how it works: Trace a design in Black Outline. Squirt the Window Colors to fill it in as you please, blending the paints to make additional colors. Peel up your design and stick it on a glass shower door, mirror, or any other glass surface you like. If you change your mind about where you want it, just peel and stick it again and again. The finished sun catchers don't fade or melt, and won't mar windows in any way. With Window Art, every room can have a terrific view. Window Art comes with six bottles of peel-off window colors and an instruction book with more than a hundred ready-to-trace designs. Winner of the Oppenheim Toy Portfolio Gold Award.