In the past, I have. You gotta find a way through, though, on your own terms, or that wall is gonna break at a very inconvenient time, and meanwhile the pressure build up isn't doing you any favors, either. The god news is that if you can do it once, it's easier the second time.
Try to connect with things that use to make you cry when you were younger. Maybe re-read Bridge to Terebithia or something. Listen to sad love songs, The Magnetic Fields have some great ones. Even happy tears — if the speech at the end of Independence Day does it for you, that's fine. Once you're crying about something low-stakes like that then you can start thinking about what's going on now that you're blocked up about and hopefully the tears keep coming.
Human rights are the ones we have by virtue of being human. Since we were human before the Internet, it's a little shaky. But at the same time, part of being human is assing down information from one generation to the next, and the Internet is a means to do that. I think both arguments have their merits, and I'm not in favor of access bring legally restricted in any case.
Emphasize proper maintenance of the space, equipment, and hygiene standards over speed in the beginning. They'll get faster over time but they'll never get less sloppy.
If they get to order a shift meal order it for them the first few times, so they know when to do it without burdening the kitchen and the appropriate price range for comped employee meals.
Make sure both the other BOH staff and the FOH are aware that they are new and the dush pit might get backed up more than usual, and to take the extra time to properly scrape plates and stack to make the new dishie's life easier while they get the hang of things.
That doesn't seem like it'd be in the child's best interest.