Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
good parenting is the best.

filtering software will filter alot of things your kids might need to see. 'Dick Chaney' is the most popular example. Image not being able to read all the articles about Haliburton that have a reference to the vice president. besides, your kids will probably be able to get around the the filtering anyways.
 
I believe .Mac is offering free Symantec filtering software to it's subscribers. I don't use it, so I can't speak for it's effectiveness.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.