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.