Featuring two set of Magic Pens – Changer Pens and Eraser Pens! Watch the colors change as you write over them with the white pen, or write with the white pen on blank paper to send secret messages which can be revealed by coloring over it. Use the Eraser Pens and Changer Pens together to create dazzling effects! Magic Pens are washable and non-toxic, and feature ventilated safety caps and tips that will not break or jam.