OE doesn't have that sort of capability.

You might try setting them up as a separate user.  That will give them their
own user space and they won't be able to see what's in your user space.

steve

If you are trying to do some filtering that your children can't alter,
you'll need to use some other program to filter the messages before OE
gets them.

Maybe something here will be useful:

Get Net Wise for Parents
http://www.getnetwise.org/