Google Sphere is a Google chrome experiment in which all elements of Google is revolving in your browser window.
The real fun is when you search for images (Google Sphere is made for image search only).
Google Gravity is another of the Google Chrome Experiments. If you think that was cool, this one is much better stuff. In Google Gravity, it initially loads a typical Google home page and then suddenly the elements are pulled down by gravity and you can start tossing them around!
This only works 100% in Google Chrome. If you run the page on Firefox, you won’t get the satisfaction of tossing the elements around!
Do let us know about how how liked it in the comments below.