There is an organization called 'The Recreational Software Advisory Council on the Internet' (RSACi) which is being used by Microsoft to rate web sites for the suitability of material for young persons. A great idea, except that only Internet Explorer seems to support it. It's worth taking a look at their site, and rating your site. The table below shows how sites are rated. Ours is 0-0-0-0, or, suitable for all ages (G-rated).

Level	Violence Rating Descriptor	Nudity Rating Descriptor	Sex Rating Descriptor	Language Rating Descriptor
Level 4	Rape or wanton, gratuitous violence	Frontal nudity (qualifying as provocative display)	Explicit sexual acts or sex crimes	Crude, vulgar language or extreme hate speech
Level 3	Aggressive violence or death to humans	Frontal nudity	Non explicit sexual acts	Strong language or hate speech
Level 2	Destruction of realistic objects	Partial nudity	Clothed sexual touching	Moderate expletives or profanity
Level 1	Injury to human being	Revealing attire	Passionate kissing	Mild expletives
Level 0	None of the above or sports related	None of the above	None of the above or innocent kissing; romance	None of the above