Blocking material that kids should not access

What is the best way to be sure that kids cannot see inappropriate material on their computers, phones and lab tops?   I know that the stock answer is to maintain parent awareness but this isn't always possible.  Your suggestions are appreciated.
tonyadamRetiredAsked:
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JustInCaseCommented:
Install some parental control software on devices.
I installed Kaspersky Internet Security on my kid's computer (when he was kid :) ) to prevent him from opening inappropriate content, and also to prevent him to spend too much time on computer (2 hours per work day, 4 hours weekend).
You can use any parental control software including Windows parental control.
KimputerCommented:
Home PC's and laptops can use OpenDNS and/or Parental Controls (feature inside Windows 7/8/10). This requires YOU to be the admin, and the kids having only User/guest accounts,

Phones/tablets are slightly harder to maintain though, but best approach would be the same (admin account for you, guest for the kids). This requires a newer phone/tablet though which has the multi-user feature built-in (newer Samsungs with preloaded with Lollipop). And it doesn't go much further than restricting apps and in-app purchases, meaning browsing habits are outside your control.

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BufferstopCommented:
Something else to try

Www.opendns.com

This prevents children going on the bad web sites. It is free to setup for home users.

You will need to reconfigure your router.
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Michael-BestCommented:
The parental controls for both Windows and Mac OS X are built in.
Free third party software:
Windows Family Safety (Windows)
K9 Web Protection (Windows/Mac OS X)
Avira Parental Control for Social Media (Windows/Mac OS X)
Qustodio (Windows/Mac OS X/iOS/Android)
Norton Family (Windows/Mac OS X)

Free Web filters:
WebFilter Pro (Google Chrome/Mozilla Firefox Add-on)
FoxFilter (Google Chrome/Mozilla Firefox Add-on)
Nanny for Google Chrome, LeechBlock for Firefox (Browser Extensions)
tinyFilter (Chrome Extension)


Read this By Brandon Widder on digitaltrends.com
Link:
http://www.digitaltrends.com/computing/best-free-parental-control-software/
tonyadamRetiredAuthor Commented:
We are trying to use OpenDNS but are having difficulty with making this service work properly.  I don't want to close the question until I am confident that this service is working.  I've contacted OpenDNS forum with some questions but cannot seem to get a response.  If any of our EE folks are familiar with this service and its installation, please let me know.
Michael-BestCommented:
Setup of OpenDNS differs from router model.

Read this howtogeek.com guide for tips.
"How to Use OpenDNS on Your Router, PC, Tablet, or Smartphone"
http://www.howtogeek.com/201312/how-to-use-opendns-on-your-router-pc-tablet-or-smartphone/
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