On each spread of this school-themed book there are two photographs that look the same - but seven things have changed from one photo to the other. The reader is invited to spot-the-difference between the two photographs. The pairs of photos in this book of picture riddles look the same-- but look carefully. There are seven differences. 'Children who enjoy the hidden-picture concept and/or riddles will love this book. It offers entertainment and an opportunity to hone observational skilled rolled into one.' ndash;School Library Journal