The amazing color-changing Magic Pens by Wham-O are so easy to use and kids have tons fun as they change colors like magic! The Color Change Pens write the color of the pens barrel, but will magically change to the color of the cap with a touch of the White Magic Pen. Eraser Pens write the color of the pen"s barrel, but will magically erase with the touch of the Magic White Pen. Magic Pens by Wham-O can be used on any paper and are also great for coloring books too! The kit also includes Magic Stencils and a bonus Blow Pen attachment to provide hours of fun! Washable and non-toxic. Ages 4+.