That stands for the National Center for Children's Illustrated Literature.
The presentation was the Wizards of PopUp by Robert Subuda and Matthew Rinehart of New York.
They showed the kids how to make popups which was really neat. Of course the kids popups were not as fancy as theirs which were on display at the Museum:
click here to see the article: http://www.reporternews.com/news/2009/may/31/popup-workshop-draws-kids-from-all-over/