Just don't let the kid use the internet in complete privacy. My kids always had to use it in a "common" area of the house. I didn't watch over their shoulders, but it was obvious that I could at any given time. Filtering content is a losing battle, not to mention a display of no trust.
A Six year old would *not* know where to 'go' on the 'net.
they would simply go to a "games" (kiddy )sites ..
if they are at school - then to where their school gives out a www site(s) to visit.
anyway, @ my kids school - they don't have any "nanny" software at all .
- because the teachers / tech support can check on where they have "been"
@ any time - via the history ( in IE ) for each kids log-in.
& as per the above Quote - no internet should ever be in their bedroom.
my setup is for both PCs to be in the family area,
with the exception of this 'nix box, which I use.