I recently treated myself to the Game of Thrones 4D Puzzle of Westeros. The puzzle consists of 3 layers. The first is a map of Westeros.
|Wil helping build layer 1.
|Completed layer 1.
|Completed layer 2.
|Completed puzzle, all 3 layers.
|The boys with the completed puzzle.
Yep, they really liked this puzzle. Now they want similar puzzles for real world locations. I have to admit, that would be a cool idea and a great way to learn history. Imagine the different layers as different time periods and flags to mark important events.