From the Manufacturer:
Crayola Mini Twistables Crayons come in brilliant colors to get your imagination spinning! Their compact size is perfect for projects at home or on the go! Just twist the barrel ends and the crayons are ready to use. No sharpening required! Coloring has never been so much fun! Non-toxic and conforms to ASTM D4236. WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 years. Imported.