It would be nice to have control over subdomains. (e.g. download.lego.com blocked but castle.lego.com allowed).
Please note that we provide this control presently. You can add "download.lego.com" to black list and "castle.lego.com" to whitelist under child's Web settings.
Please see following link to know how to add a web site to black list:
https://onlinefamily.norton.com/familysafety/help/blocking-a-website.jsp
And please see the link below to know how to to add a web site to white list:
https://onlinefamily.norton.com/familysafety/help/allowing-a-website.jsp
Please let us know if that does not answer your query.