Lupu is a small brand, I think it’s Danish. About ten years ago they had a series of fragrant puzzles, where some of the pieces felt a bit rough when you touched them (exactly like with glow-in-the-dark puzzles), and if you rubbed those pieces, they would emit a fragrance, in this case smelling of oranges. There was also one with chocolate, but this is the only Lupu puzzle I’ve ever done.
The quality was good, but if you happen to come across one of these fragrant puzzles, I’m pretty sure the fragrance has dissipated in 10 years 🙂