Some times we need to remember that keeping children safe is very important online too. There are numerous cases were children have fell victim to cyber bullies and internet predators and this needs your attention as much as your kids have your attention on other parts of their safety.

“Humanitarian and development efforts require a very clear understanding of the roles and responsibilities towards the care and protection of children.The Keeping Children Safe Coalition provides the necessary standards and means of meeting them for agencies and organisations working with and for children. It provides a good basis for the development of effective measures to prevent and respond to violence: from awareness raising strategies to safeguarding measures. It offers an excellent opportunity not only for the improvement of the quality and professionalism of those working with children, but most importantly, it will help to achieve a greater impact for children.”

Paulo Sérgio Pinheiro,
Independent Expert for the UN Study on Violence Against Children

It all boils down to how you keep your kids safe online. There is a way to ensure that they can be protected from things such as pornography, try using an internet filtration system like Sentry PC to get your kids safe online.
you will be able to monitor their activity as well as keep them on focus with things that interest them and can cuase them to learn rather than to be bombarded by irreverent content that just entertains rather than teaches.