Do you like moving puzzles? Rummikub is a spin off of the card game Gin Rummy. It starts out easy with runs and three of a kinds but as the board builds the combinations get harder! If you start your move but cannot finish you LOSE. How hard could that be? Like I said in the beginning it is simple but toward the end when you have twenty sets in front of you to keep track of it becomes much more of a memory game! Good for ages 10ish and up. I played a 5th grader at Thanksgiving and that kid almost kicked my butt.