RAINBOW PAPER PEN: The pen's interior is made of recycled paper in rainbow-like colors. Premium HB #2 lead for smooth writing and drawing. Eco-friendly & Safe for Kids: Non-toxic and biodegradable, safe for the environment. Also completely free from harmful substances, safe to use in school and daycare (from age 3). Unique Design: Our rainbow paper pens are painted with four beautiful, vibrant pearl colors, featuring rainbow-tipped ends on the pens. Easier to Sharpen: Paper pens are much lighter to sharpen than other pens. Strong and durable. Made from tightly wound paper rolls, so the pens are as hard as wooden pens. The Perfect Gift: An ideal gift for those who care about the environment. Can be used in school, at the office, and in stores. Offers a unique and practical gift.