The BEST answer is to have a kids logon as well as an adult one - this would also prevent the children from spending any money online - this might be an intensive to make the effort worth while.
You will have to test but many pop-up notifiers only show the first few lines of any message. If you format your messages as:
I can recommend Duplicate Photos Fixer Pro. It works good for me. But be patient when using Similar Matches because this feature can produce wrong result. You will need to manually check all photos.
Other software which I use in parallel:
Duplicate Manager Pro
Duplicate Photos Fixer Pro
Photos Duplicate Cleaner
I used Duplicate File Finder recently and it worked well and was extremely fast. Pretty simple to use, just drag a folder onto specified area after opening. This app was free and available from the App Store. It doesn't do photos though. There are several mentioned on the internet but I've never tested them myself. Hope this helps with files though.
There's no way to make a noise-cancelling program over speakers because the computer has no way of knowing distance from your ears to the speakers.
Noise-cancelling headphones scan for incoming sound and produce the opposite (canceling) wave. "Noise-cancelling headphones" are a misnomer - they counter incoming sound instead of blocking it.
If the noise-...