OpenColleges.edu recently produced this great interactive graphic on internet safety. The graphic has a lot of information on some of the most widespread internet threats to your children including cyber bullying, identity theft, and computer viruses. In addition the graphic covers the topic of plagiarism and goes on to promote general internet safety tips for all circumstances. The graphic comes out of Australia so many of the recommended resources are based down under but a quick Google search should turn up resources in your respective countries.
Take a moment and check out the graphic, it's well designed and easy to navigate. If you're looking for even more information on internet safety try our Cybersecurity 101 series.