Good evening!
As I understand,so far in SMF/Fukuroi/Mediquip they have no related written policies about children's visiting in the manufacturing plant. Just in several special company events like Family Day,children will come into the plant, but this kind of event should get approval in advance by local management team.
I suggest that site EHS/security coordinator can work with HR/Admin team to develop the specific procedure to control the entries of children. Meanwhile the communication with our employees is very important to insure they fully understand and support this procedure implementation.
Does this answer your questions? If any further questions or more detailed information about this issue, please feel free to let me know.