The Bubbles web site shows IE logo "bubbles" that move in front of the screen, slowly exposing a winter landscape. The demo can be altered in a number of ways, including the amount of bubbles on screen, the collision effects, how gravity affects the bubbles and more. At the bottom of the screen you can see the frame rate of the demo along with info about its computation and rendering time.
The Bubbles site works with other web browsers as well but instead of the IE logo, the "bubbles" turn into the logo of that browser such as the Firefox and Chrome symbols.
The IE blog site goes into a great amount of detail on how the Bubbles demo site was made. It states:
Source: IE blog site | Image via Microsoft