. >> how would you explain the world, hagada. >> it is the book used during the passover, which is the ritual dinner that is held one time a year -- passover is eight days. but it is usually held on the first and second nights. and then again on the final night. the hadaga is the book that gives the instructions. it includes passages from the bible. it includes sections -- on ritual and songs. many times, it includes illustrations. >> i think we have a couple pictures to show folks about examples in the exhibit. what are we looking at here? >> this is a page that illustrates the four questions. and one very critical part of the tradition is dialogue. and the asking him questions, and the retelling of the story through conversation. this page shows the passing on of the story from one generation to the next. >> wonderful. i think we have one other image to show. >> this is an illustration of the four sounds -- sons and it is supposed to represent all of mankind. and all these different types. so what is really important about this page is that we have the wicked son, and it is illustrat