How Korean children actually play with the sugar candy
Because it has a strong following among English-speaking audiences, the sweet candy from episode 3 was already well-known, though most people outside of Korea were probably unfamiliar with it.

The term “sweet” is derived from the English name, Honeycomb. The confection in Korean is called Ppopgi or Dalgona, and the objective is for the youngster to cut out the form printed on the candy successfully. That’s something Squid Game made clear.