If a lot of glue is used in the process of making paper puzzles, and the glue contains toxic substances, it may be harmful to human body. In this case, it is suggested to expose to the sun before playing to reduce the harmful substances on the puzzle.
If the paper puzzle itself is tasteless and the magnetism is harmless to the human body, it is harmless to the human body.
In a word, whether the magnetic smell of paper puzzles is harmful to human body needs to be decided according to the specific situation. If the puzzle is found to have a strong pungent smell, it may be high in formaldehyde, which may have an impact on human health. In this case, it is recommended to dry first and keep ventilation when using.