Game props
Flat ground.
Competition method
Participants sit face to face or stand in two rows. At the beginning of the competition, the first person in a row began to laugh for 2 seconds, then grabbed the "smile" on his face with his hand, immediately leaned his face back, and then threw the "smile" at the opposite contestant. Participants who receive the "smile" must laugh immediately, and then grab the "smile" and throw it to the second person opposite after 2 seconds ... According to this method, the "smile" will be passed to the end of the line in turn.
rules of a contest/competition
Those who have not received the "smile" and have passed the "smile" will be punished if they smile, and those who have caught the "smile" without keeping a straight face immediately will also be punished.