Kidzui: The Kid's Web Browser

Kidzui is a web browser, search engine & social network just for kids! Parents can view their kid's online activities, block & add pages and share content with their kids. Kidzui has prescreened millions of games, websites, pictures and YouTube videos that are safe for children.

There is a free version and a pay edition that includes access to more content. It is available on Windows, Mac and Linux.