The tool is one of the list on ‘Do to Learn”s site (http://www.dotolearn.com/); it’s Facial Expressions. The direct link is http://www.dotolearn.com/games/facialexpressions/face.htm

One user wrote in talking about her son:

“My son has a great deal of difficulty “reading” people’s nonverbal expressions, and this game seemed a perfect tool for him.  He played with the game here and there for about a month and I wasn’t sure if he was getting anything out of it.  Then one day he came in and told me about something unexpected that happened at school.  I asked if his teacher was surprised.  He pondered a moment, then said, “Why yes!  She was very surprised!  Her eyebrows went up and her mouth made into an oh!”  CLICK!  That was the first time he related a facial expression” with an emotion!“