Crayola Watercolor pencil in assorted colors and has wood barrel with 3. 3 mm lead. Pencil can be used in a variety of dry/wet techniques and watercolor effects can be attained with the addition of water, sold as 12 per pack. Pre-sharpened watercolor pencils. 3. 3-mm. AP certified nontoxic. Use as traditional colored pencils or blend colors with a few drops of water to add watercolor effects. Made from reforested wood. 12 rich, vivid colors. Provides watercolor and drawing effects. Use for dry and wet techniques. Add water for watercolor effects. 12 Assorted Colors. Watercolor woodcase pencil provides watercolor and drawing effects, can be used for dry and wet techniques, has 12 assorted colors.