Packed with more than 100 brain-boosting picture puzzles, this Smithsonian Spot the Difference book for adults is designed to keep your mind sharp and thoroughly entertained. Keep your brain fit by searching for the hidden differences between each set of pictures, specifically curated from the Smithsonian's archives. Help improve memory and focus by completing a new challenge in this "Find the Difference" puzzle book every day! Keep your brain fit and your memory sharp with a variety of fun and engaging puzzles from Brain Busters. From Crosswords to Word Searches to Spot the Difference and other stimulating challenges, our curated collection offers hours of mind-sharpening fun in these brain-training games to enhance memory and cognitive function.