Many may not be aware, but there are several different types of colored pencils. The artist grade pencils, as you might expect, have a higher concentration and higher quality of pigment, more resistant to UV rays. There are student/business colored pencils, not as color intense and lightfastness is not really a consideration. Though limited in colors available, there are also refill "leads" for mechanical colored pencils. Also used as art medium, there are also watercolor pencils (which, amazingly enough, can be used wet or dry) and pastel pencils, which are harder than standard pastels and can be sharpened, like a pencil. Colored pencils are also called pencil crayons, because of their artistic applications (of course) but also because they are not graphite, like the usual "No. 2" pencil. Artistic and business/scholastic colored pencils have wax- or oil-based cores. Strangely enough, though the use of crayons can be traced back to the Greek Golden Age, it was as recently as the early twentieth century that artist-quality colored pencils actually went into production. This design is so much fun! A line of sharpened, colored pencils appear to have been dragged across a sheet of plain paper, leaving a line in their wake. Greens, blues, oranges -- colorful and whimsical, this delightful greeting card is appropriate for teachers, students, art students, crafters and artists -- whether celebrating a birthday or just letting them know you are thinking about them.