Google Drive Work-Around
...because it's still not working.
If you or your kids get an error, it might look something like this:
One way you can get around this if you need your kids to share something, create a folder, etc. you can go through the desktop version. Go to Safari and follow these steps.
From here, you should be able to share, add folders, move things, etc. You may have difficulty making a check mark in the little boxes in order to select it for sharing, etc. I usually zoom in a bit by pinching out and have more luck. You can also edit things here.