Soft puzzles
3D puzzles
— jigsaw puzzles, the assembly of which produces not a flat image, but a three-dimensional figure — for example, an animal, a building, a car, an airplane, etc. Such puzzles require you to think in three dimensions, which is why they are often more difficult and at the same time more fun than traditional puzzles.Note that volumetric plastic puzzles are usually included in this category; sets of metal parts are separated separately (see the relevant paragraph).