CRAYOLA-Twistables Fun Effects Crayons. Give your creativity a boost with fun effects like neon, metallic, and rainbow! Twistables crayons feature break-resistant plastic casing and never need sharpening-just twist and color! This package contains eight neon crayons, eight metallic crayons, and eight multi-colored rainbow crayons. All twenty-four crayons come in a reusable plastic storage case. Conforms to ASTM D 4236. WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 years. Imported.