Bright colors apply and blend easily for fun, imaginative drawing. Delivers bright colors, smooth laydown and easy blending for fun drawing. Ideal for use on paper, cardboard, wood and fabric. Smudge-proof, waterproof formula helps eliminate messes. Bulk crayons come in red, blue, yellow and green colors. ACMI Certified AP Nontoxic. Conforms to ASTM D4236 standards. For detailed information see www.astm.org. Less harsh chemicals - made with fewer harsh chemicals, or safer chemicals than typical alternatives, helping reduce your use of and exposure to substances that may be more harmful to your health and the environment.