What's Missing : Look and look and look-can you find what's missing?

Where's Waldo meets I Spy in this great can-you-find-it book that comes with a built-in magnifying glass! How sharp are your eyes? Where's Waldo meets I Spy --a great can-you-find-it book that comes with a built-in magnifying glass! This totally intriguing book features thirty-two pages that contain nearly identical images--in which just one element of the picture is different from the others. How sharp are your eyes?