Links to all my favourite websites:
http://www.shockwave.com - A great website of games for any taste, from 3d to jigsaws.
http://www.nick.com/games/nickgames.jhtml - Great games for all the kids out there!
http://www.popcap.com - Some of the games that are on shockwave came from here! Really addivtie in here!
http://www.counciloferlond.com - A site i've come across more recently, great for all you Lord of the Rings fans out there!
http://www.bbc.co.uk/cbbc/newsround - A good site from the BCC, great for kids, filled with news and things that will interest them
http://www.yahoo.co.uk - Not my personal favourite search engine, but still good!
http://www.google.com - Now this is the best, I think! A great guide to the web!
~I'll add some more as time goes by!