Molecule model cards (Moruka) = 1620 yen ($15.88 €11.74)

I bought molecule model cards called Moruka through the internet for 1620 yen ($15.88 €11.74). Moruka cards are scientific, educational cards. On each card molecule structure is printed. Students can learn molecule structures of 48 substances visually.

Unfortunately, it was sold out after I bought them.