KidZui (http://www.kidzui.com)

KidZui's recently launched "K2" browser gives young surfers a good opportunity to get their feet wet exploring the web -- and gives parents the security of knowing that their kids won't stumble across any R-rated music videos or super-violent shoot-'em-up games. The focus on featuring sites with a commercial bent -- from toys to TV shows -- may irk some parents, but kids can get a more educational experience by using the search function to find fun sites about animals, astronomy, or whatever else piques their interest. While the new KidZui's parental controls are not quite as robust as the classic version, the site does a reliable job choosing age-appropriate content.