It's such an innately educational medium - children are always learning, but they don't feel like they're in school. Lately, though, many fear that the Web gives kids a different kind of education - a more prurient one usually kept farther out of children's reach. Magazines such as Playboy and Penthouse are on the Web, as well as sexual storefronts selling everything from condoms to X-rated videos.
Some sites have photos, although many of the most explicit now require a credit card.
If not online, somewhere else.