15 Puzzle Game: This is one of the most versatile and challenging puzzles of all time. Mix up the numbers then slide them around to put them back in sequence. Be careful though, you might be down to your last row and have to mess up everything to get the numbers where they belong! With over a trillion possible solutions, you can always challenge yourself to the puzzle again and again. Intended for ages 8 and up. UPC: 400069329973