This game is played by having players change their actions while shouting "Cham-Cham-Cham" three times. For the first two rounds, the hands are kept in the same position; on the third "Cham," the player changes the direction of their hands to the left or right to attack, causing the opponent to turn their head in the opposite direction to defend.
This game is primarily effective for improving concentration and reflexes, and as a simple yet thrilling physical activity, it is enjoyable for people of all ages. Its key feature is the fun of testing split-second judgment while playing casually with friends or family.