By default you open a library in the full view. A virtual library must be either manually opened to display the subset, or else set to always open in the virtual library, by going to Preferences ==> Behavior and setting "Virtual library to apply when the current library is opened: ___________"
I hope you realize that your children can still easily switch the view to the main library view, so this isn't exactly a secure method.
Virtual libraries are meant to be used for your own sorting purposes, and can also be used to restrict the content server. They may function as parental controls to a certain extent, but only through the principle of "Security Through Obscurity" which is not a good idea to rely on.
Also, you may want to use a tag rather than series to mark the virtual library's content. Series should be reserved for handling actual series metadata, and tags work just as well, without messing anything else up.
|