Our book meets all of your child needs in terms of concentration, attention to detail and insight. Everything is done gradually as the book is structured across 5 levels of difficulty. To track progress, on each page you or your child can write the time needed to find all the differences. The book has child-friendly pictures of various sizes, including large full-page images. We think it's important that as your child flips through the pages and the difficulty level increases, he discovers other similar activities to do such as: measuring the heights of buildings, finding a parrot among many other objects of the same color or even coloring in only the differences between the pictures. #spotthedifference #booksforkids