Thanks, it doesn't need to be anything 100% unbreakable. It is for someone with learning disabilities, so they don't happen upon any sites with unsuitable content but they are determined to get the internet! I just want to make sure that they can go to the BBC and some other sites.
A white list can work - how would I go about doing it?
Also I will check out opendns.
Thanks
Daven
Edit: it seems that opendns doesn't yet have a whitelist.