Mess free. Colors only on Color Wonder Paper! Won't color on: skin; walls; carpet; clothing. Conforms to ASTM D-4236. All Crayola products are safe and non-toxic. What is Color Wonder? Color Wonder Markers are designed to only color on Color Wonder Paper. It's magical! Watch the clear ink change to color in seconds as it dries on your Color Wonder Paper! The ink is clear but each marker is a different color. Washing & Care Information: Color Wonder Markers use clear ink that is invisible on most household surfaces. Color Wonder Markers may alter the appearance of some surfaces such as vinyl and leather, and color may appear on finished and unfinished wood. Care should be taken to protect these surfaces. To minimize any change in appearance, wipe Color Wonder has been designed to not stain clothing. In the event that staining occurs on clothing or other surfaces, please call 1-800-CRAYOLA for stain removal instructions Where do I buy more paper? Additional Color Wonder Paper can be purchased: At local retail stores. At www.CrayolaStore.com. For additional ordering information call 1-800-CRAYOLA. Made in U.S.A. Assembled in U.S.A.