Larsen's puzzles have a frame in which the puzzle pieces can easily be placed again and again. The puzzle pieces each have their own unique shape that only fits in one place in the frame. Because the total thickness of the recycled cardboard of the Larsen puzzles is 4.4 mm thick, it will last for years. In the Larsen Land and World Maps theme you can learn the whole world, including flags, in a playful way. The perfect way to take your topography knowledge to the next level!