My six-year-old great-granddaughter and I gave up on this puzzle and thought some of the pieces were from another puzzle until we realized it was two-sided. I had never seen such a puzzle before. I think there should be a printed warning on a puzzle such as this to avoid discouragement. She and her grandfather finally completed the puzzle in 20 minutes and he took a picture of both sides to post on Facebook. At least it made a good story.