Crayola Triangular Crayons are ideal for student art projects. Triangular design prevents the crayons from rolling off desks and makes it easy for students to get a grip on proper writing habits. Great for classroom and home use, they promote more purposeful and controlled drawing. Inside the box is a reusable, durable tray. The clear plastic lid simplifies storage and distribution in the classroom. Crayons are nontoxic.