Smooth Operator. These are some smooth operators. And bold ones, too. Whether you're drawing a knight in the midst of battle or your knight in shining armor, this metallic gel pen pack will finally give you the colors they need to make them sparkle and shine. You buy, Yoobi gives - For every Yoobi item you purchase, a Yoobi item will be donated to a classroom in need, right here in the U.S. Multi-color gel pens, 3 pack, 1.0mm medium tipped. Color: Multi-Colored. Age Group: Toddler.