Sharpen your attention to detail and master the art of observation with photo puzzles that will bring back fond memories of a simpler time. Picture Puzzles: Remember When will take you on a journey back in time with delightful photos and bits of trivia sprinkled throughout. There are 4 different skill levels, so the challenge increases as sleuthing skills become more acute. Portable, so puzzles can be worked on anywhere on your trip down memory lane! Spiral-bound, measures 20.3cm x 23cm