Watch a rainbow of colors appear like magic with Bendon?s Secret Life Of Pets Imagine Ink Magic Ink Pictures! Artists of all skill levels will love finding Duke, Gidget, and their friends hidden across 24 magic reveal pages! Its compact design makes it perfect for travel, too! Designed to be used with the included Imagine Ink Marker, a clear marker that will not visibly mark most other items! This is an official Secret Life Of Pets product, accept no substitutions! Ideal for ages 3 and up.