Wham O Magic Pens, Amazing Color Changing Pens The original and amazing Magic Pens by Wham-O that change and erase color like magic! Kit includes 20 markers including 9 Color-Changing Pens; 9 Eraser Pens; and 2 Magic White Pens. Also, included are Magic Stencils, a Storage Stand and a bonus Blow Pen attachment. Use on any paper including coloring books. Colors never smudge or run. Create magical works of art and write and decode secret messages!