I think it's a cool idea and I see why you'd like it and why it may be useful! But Kidzworld is for all of its users, and if certain threads were only for certain age ranges then I don't think it would be particularly fair. We do, of course have the age-restricted Girls/Boys only sections of the forums, which I think as Huge said, only show for people over 12 years.
But it's a good idea!! If you see anything that you find inappropriate for younger users please don't hesitate to contact a Jr Mod to check it out for you!
i used to have a very creative signature, however, now i am unable to centre my signature therefore i shall not bother trying to make it pretty because i will never think it is pretty anymore good day to you