When one pen runs out of ink, simply choose another! A fun writing tool to keep on hand, these Shuttle Pens are sure to make jotting down great ideas and to-do lists a lot more fun. Perfect to hand out as party favors during classroom celebrations, colors include black, brown, dark green, tan, red, purple, turquoise, navy, pink and light green ink. To switch to one of these fun colors, simply push down on the color nob of your choice, doodle and write and then push the top button to retract the color. And repeat! Safe and non-toxic.