구슬치기 is a traditional Korean game played with small glass or clay marbles. Players take turns trying to knock their opponent's marbles out of a designated area using their own marble. The game is often played on the ground, where a circle or square is drawn to mark the playing field. The objective of 구슬치기 is to collect as many marbles as possible by successfully hitting them. Players typically use a flicking motion with their fingers to propel their marbles. This game is popular among children and is often played in neighborhoods or schoolyards, fostering social interaction and friendly competition.