This is an article on the importance of self-control. Below the article link there are two you tube videos that demonstrate the experiment described in the article.
http://www.newyorker.com/reporting/2009/05/18/090518fa_fact_lehrer
http://www.youtube.com/watch?v=6EjJsPylEOY&feature=related
http://www.youtube.com/watch?v=i0oPuAO3M8c
http://www.newyorker.com/reporting/2009/05/18/090518fa_fact_lehrer
http://www.youtube.com/watch?v=6EjJsPylEOY&feature=related
http://www.youtube.com/watch?v=i0oPuAO3M8c