Children's Hello Kitty Secret Message Set Magic Ink Pen Invisible Creative Toy Children's Hello Kitty Secret Message Set Magic Ink Pen Invisible Creative Toy Perfect instead of party bags or birthday presents Includes 2 invisible ink pens 4 magic colour pens to reveal your secrets Secret Notepad Write your secret message with the invisible ink pen and then colour over the written area to reveal your secret message Makes perfect travel holiday activity or in the car!