As a person who worked with children (12 years), I would say you handled the incident brilliantly.

I am only concerned with what happened in the year or so before that. He learned those things from you, but you didn't seem to have success in explaining where and on who they are to be used.

I think he knows now!

http://photos-d.ak.facebook.com/photos-ak-sf2p/v135/37/85/626881320/n626881320_536267_6485.jpg