So, I know that there were a lot of products created in Germany, but what about other countries? What about songs, books, picture books, etc.?
In terms of posters there was a large amount aimed directly at children and families in an attempt to guilt the man of the house to join http://www.ethanlewis.org/history/greatwar/children/ourdaddy.jpg. I am speaking for Canada, and one of the tactics here were women christian groups speaking at schools for much the same reason.