LEE PUBLICATIONS Shrek Life of an Ogre Invisible Ink and Magic Pen Painting Go on a fun adventure with Shrek, Donkey and Puss In Boots in this 2in1 activity book which includes Magic Pen Painting and Invisible Ink. Use the special pen and a rainbow of colors will instantly appear. Then with the same special pen, fill in the dotted area and invisible images and words will become visible. Book Includes: special pen and 24 pages of fun Ages 3+ , Book Size: 5 1/2" x 8 1/8"