Google's Be Internet Awesome
This website helps guide children to "be safe, confident explorers of the online world". Download the Be Internet Awesome Curriculum for helpful scenarios and conversation starters to get your kids talking about being responsible digital citizens.
The Interland game lets children "play their way to being Internet Awesome... [it's an] online adventure that puts the key lessons of digital safety into hands-on practice with four challenging games."
Take the "Be Internet Awesome Pledge", (the PDF on this page).