Color can also be achieved through crayons, pastels or colored pencils. From notebooks, pens, markers, paper, binders, pencils and even paper shredders. Cross' products include fountain, ballpoint, and rollerball pens, mechanical pencils and refills. Plastic is suitable for both pencils and drawing pens. Tools such as pens and pencils mark the drawing medium. Suitable for both graphite pencils and technical pens. Hectograph pencils and pens are sometimes still available. These include colored pencils, markers, inks and paints, modeling clays, coloring books, and artists' tools. Colors may be matched using acrylic paints or simple colored pencils. This color was formulated for Crayola colored pencils. Artists currently use extenders to maximize the use of their colored pencils. Children have access to paper, pencils, books, and toys. All children are offered pencils and paper. Using lower grade colored pencils does have its advantages, however. Morisot actively experimented with charcoals and color pencils.