I've a 9 year old boy that loves the web, obviously want to steer him clear of the dodgy stuff but also want to keep his interest levels up ... so that one day he can keep me in the manner to which I wish I was accustomed

Anyone know of any good sites for him to look at? He already goes to Miniclips, and all the major "telly" sites like Disney, Nickel etc etc ... am looking for other stuff for him. If anyone knows of anything educational yet interesting, that would be awesome.
Thanks to any people who reply in advance.
