Solve the Unsolvable: This 639-piece lenticular 28"x19” puzzle features layers of Tetris tetrominos with color-shifting puzzle pieces that will keep you guessing all the way to the last piece 2-in-1 Puzzle: Want even more of a challenge? If you solve the impossible, add on the 56 bonus pieces for an extra 9.25”x 6.25” tetromino piece puzzle to add additional complexity Solve & Display: Once you’re done, display your puzzle with the included matching poster Family Game Night: Keep the fun going with more Spin Master Games to add to your family’s board game shelf: Hedbanz, Beat the Parents, Family Feud, Jumanji, Wicked: The Game, Mind the Gap & more Holiday Gifts: For stocking stuffers & gift ideas, we have holiday gifting covered with gifts for kids, gifts for her, gifts for men, gifts for 8 year old girls, gifts for 6 year old boys & more Includes: Lenticular Puzzle, Poster Covered by the Spin Master Care Commitment. See below for full details