CRAYOLA-Window Crayons. Instantly decorate any glass surface! Turn your windows, mirrors, and other glass surfaces into holiday celebrations quickly and affordably. Bold colors go on smoothly, dry quickly without smudging. Easily washes off. Package contains: five window crayons. Nontoxic. Conforms to ASTM D4236. WARNING: CHOKING HAZARD-small parts Not for children under 3 yrs. Imported.