Great for use in the home or at school Crayola Ultra-Clean Washable Crayons are an essential creative tool for kids. This pack contains 24 non-toxic crayons that are specially formulated to wash clean from skin clothing and even painted walls. With classic colors and bright fun shades the crayons inspire self-expression and imaginative play.0 Great for use in the home or at school Crayola Ultra-Clean Washable Crayons are an essential creative tool for kids. This pack contains 24 non-toxic crayons that are specially formulated to wash clean from skin clothing and even painted walls. With classic colors and bright fun shades the crayons inspire self-expression and imaginative play.0