Crayola - CYO520836051 Bulk Crayons allow you to replenish the color that you use most often to provide hours of coloring fun. They are perfect for children 4 and over. Regular-size crayons come in a reusable tuck box and are double-wrapped crayon for extra strength. Permanent, waterproof crayons are certified AP nontoxic crayons conform to ASTM D-4236.