The Ozobot 4-pack Color Markers Set is used to draw lines and color codes for programming on paper. The Ozobot Marker Set includes one of each color: red, black, blue and green. You can create roads, mazes and maps while building STEM skills. The angled tip makes color coding easy for young children. Don't worry parents and teachers, the Ozobot Marker Set is washable and non-toxic! Start personalizing your Bit today with these fun writing tools.