4+. Nontoxic. Serpentine design. Contents and colors may vary. crayola.com. Questions/Comments Call 1-800-Crayola (800-272-9652), M-F, 9 AM-4 PM ET. Safety Information: ACMI AP: Art & Creative Materials Institute certified. Conforms to ASTM D 4236. All Crayola art materials are nontoxic. CE listed. Made in China.