Ttakji game (딱지치기) is a Korean traditional game using folded paper disks. The Korean friends instructed us how to fold a Ttakji by using colourful thick paper.
You can watch this video to know how to fold a Ttakji paper:
-When you finish folding the paper into a square one, you start to play the game by throwing your Ttakji paper down upon your opponent’s Ttakji paper to make it flip.
-If your opponent’s Ttakji paper flips, it becomes yours and you get one point.
TTakji is a very common game in Korean and I remember seeing it featured on the show Running Man.