Nontoxic. Super smooth! Crayola Twistables Slick Stix Crayons are super smooth! Slick Stix add rich, vibrant color to any creation. Just twist the barrel end and glide on the color! No sharpeners needed. No labels to peel. Plastic barrels protect Slick Stix from breaking. Colorings has never been so much fun! Safety Information: ACMI - AP: Arts & Creative Materials Institute Certified. Conforms to ASTM D 4236. All Crayola art materials are nontoxic. CE listed. Made in Korea.