This is no ordinary experiment. He sits a kid in front of a plate with one marshmallow. The kid is told that if he can wait 15 minutes without eating it, the kid will get 2 marshmallows. Some kids ate the marshmallow right after the researcher closed the doors. While others squirmed and withheld their desire, until finally collapsing to temptation after a few minutes. There were a few that held out til the end, they were rewarded the second marshmallow.