Kids placed in a room with one mouthwatering marshmallow.
The Catch: they can either have the Marshmallow now or they can wait till the adult comes back and get a bonus marshmallow.
Its the ultimate temptation for these cute little souls, watch it
http://www.youtube.com/watch?v=G7LN96jEXHc
Another video, same concept, but more scientific
http://www.youtube.com/watch?v=i0oPuAO3M8c
