No sharpening needed, and no paper wrappings to peel. Simply twist the barrel when you need more crayon. Terrific for filling in coloring pages, or drawing scenes free-hand. The case helps protect the crayon from breaking, and you can easily see how much is left. Mini size is terrific for travel, too. Each crayon barrel measures 4-1/2" tall. 24 colors in each package. AP Seal, non-toxic.