Like the usual wooden jigsaw puzzles, they come with varying degrees of difficulty, but unique features such as multi-level structures, interaction and combination with different materials vastly differ from other wooden jigsaws puzzles. Their designs and themes are out of this world, literally! Some advanced variants even come with hidden messages or smaller puzzles within them. These jigsaw puzzles are outstanding in comparison with more common puzzles because they engage the attention of the user at different levels.
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