You can find information on almost ANY subject, viewpoint or idea on the 'Net, no matter how unique or bizarre it may be. When a child, either intentionally or by accident, tries to visit a site that is violent, pornographic, etc.
Most Internet filtering software can rate Web sites based on adult content.
Some software allows the parent the ability to remove or add Web addresses the child can view. There are more than 30 different products claiming they protect children from Internet trash. The four most widely circulated programs are CyberPatrol, NetNanny, SurfWatch and CyberSitter. You can buy programs from mail order companies as well. Computer shows and fairs, advertised in the computer section of your Sunday newspaper, are another source of purchasing these products.