"Get ready to meet pandas, zebras, bears and more with the Inkredibles Spot the Difference: Animal Fun – Invisible Ink Activity Book. Spot the hidden differences between cute illustrations of friendly animals from around the world including waddling penguins, snapping crocodiles, best-in-show dogs and more. Kids will love using the Invisible Ink pen to spot and reveal each difference, before testing their knowledge with fun trivia questions on every page. • 11 spot-the-difference activity pages • Invisible Ink marker"