Ask Jeeves search engine has a kids version http://www.ajkids.com
There is a little Rubik's Cube on the page as an icon for 'Fun and Games' (don't see a Rubik's puzzle game there though....hmmmmm?). I was using the search engine with my new class of 10 year old children today and none of them knew what the icon was of! The youth of today!!!!!!!!