Jumbo silky gel crayons feature eye-catching brilliant colors, a buttery texture, and superior blending that helps you create works of art with ease. Little artists can learn the basics of drawing, coloring, and blending because they are ideal for beginners. They're great on textures, dark surfaces, glass, mirrors, paper, and posters. Draw on top of colored pencil, wax crayon, watercolor crayon, and gel pen. Twelve jumbo washable crayons are stored in a sturdy plastic storage case with individual spots to hold each crayon, so you can always keep them neatly organized and on the go. Non-toxic, acid-free, conforms to ASTM D-4236.