Non-toxic. Vibrant colors on light or dark posters! Great for school projects & science fairs! Covers large surfaces! Make all your projects stand out with Crayola Poster Crayons! They're specially formulated to create bold, vibrant colors on light or dark posters! They look great on construction paper, too! Safety Information: ACMI - AP: Arts & Creative Materials Institute Certified. Conforms to ASTM D 4236. All Crayola art materials are nontoxic. Crayons meets performance standard ANSI Z356.1. CE listed. Made in Mexico.