The Marshmallow Test

I wish I was more tech-savvy, in which case I would directly embed this video of The Marshmallow Test (which, if I'm not mistaken, was performed on my sister when she was little). Suffice it to say the video is a cute compilation of kids faced with the very difficult decision: should I eat this one marshmallow now, or wait and get two marshmallows later? Oh, the temptation...