Check browser's history
Does your children visit the harmful sites by accident?
You can check the history to know the filtering is need or not.
The history of a browser can be inspected directly.
It is the function to use the database of KidsGoGoGo, and inspects how many harmful sites to be in the history file.
If you check the "Save the results" check box before start,
harmful sites list is exported as HTML format in your desktop.