You draw something on a sheet of paper with a pen. When you then paint over it with a white pen, the original color magically changes. The color shifts from that of the pen's casing to that of the pen's cap. With two-color pens, this is a transformation. With single-color pens, this is an erasure. You can also first paint something invisible with the white pen and then make it visible again with a one- or two-color pen. Washable at 60 degrees. 12 two-color pens - color transformable, 9 single-color pens - color erasable, and 4 white magic pens.