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.