Slim, color pencils feature grooves that make a proper grip seem logical to young students. Innovative, ergonomic shape offers a natural grip-zone, made from all-natural materials. Offset slide guards for thumb, index and middle fingers support an optimal writing hold - even after sharpening. Design also features an extra break proof, 3.3mm core that is color-intensive and waterproof. Certified AP nontoxic pencils are easy to sharpen in a regular sharpener and are ideal for children of all ages. This 144 piece set includes 12 each of 12 colors.