Adult supervision is recommended. Intended for bath use only. Products may stain certain porous surfaces such as unsealed tile and grout. Test on a small area before using in your tub and bath areas. Avoid contact with certain surfaces and materials, such as wood, wallpaper, painted surfaces, vinyl, carpeting, and other materials that cannot be washed or laundered. Wash immediately after use, do not leave on overnight. Crayola Bathtub Markers contain colorants that may stain towels, linens, fabrics, and other surfaces. Repeated laundering may be necessary. Wash any color residue from skin with clean soapy water before using towel.