Have you ever heard of the marshmallow test? If not, let me start by saying that this is a famous experiment. Allegedly, the experiment aimed to identify the ability of becoming successful in small kids. In short, four year old kids were given a marshmallow, they were put in an isolated room and they were told they’re going to get another marshmallow in a few minutes IF they won’t eat the first one...
http://www.dragosroua.com/the-marshmallow-test-they-got-it-all-wrong/