CRAYOLA-3d Sidewalk Chalk. Create your own amazing effects with specially designed Crayola dual-ended 3D chalk. Contrasting colors are paired up making it easy to create popping art and scenes. No matter what your skill level is, Crayola makes it simple to get amazing results! This package contains five dual-color chalks (ten colors), 3D glasses and an instruction booklet. Easy water clean-up. Conforms to ASTM D4236. Recommended for children ages 4 and up. WARNING: Choking Hazard-small parts. Not for children under 3 years. Imported.