The BJZ was a welcome distraction from everyday concerns for Jewish children. The BJZ tried to create a relaxed atmosphere in the few available and barely usable locations. Jewish youth leaders engaged the children in activities such as manual labor, music, folk dancing, and Jewish history. A lot was also done in sports. This met a clear need because Jewish children were not allowed to be members of sports and other entertainment associations.
Source NIOD
http://www.omnia.ie/?navigation_function=3&europeana_query=Joodse%20Raden