LYRA Groove Slim Child-Grip triangular colored Pencils, 3.3 Millimeter Cores, Includes Sharpener, Set of 24 triangle Pencils, Assorted Colors (2821240) Grooves facilitate proper grip 3.3 millimeter cores Extra break-proof, brightly colored, waterproof lead Box of 24 assorted colors Earn free supplies - Visit the Prang Power website for program information