This simulation provides an eye-opening opportunity to experience the WWW from the point of view of a sightless person. As when using a screenreader, the content of the page is read aloud with no visual clues. I've used this simulation as a demonstration in several Web development courses. Students have responded with amazement. They gained understanding of the need to include accessibility features in their Web pages. They also gained respect for the ability of people without sight to use the WWW.
It's worth reading the explanation before trying the simulation. It is also possible to see the mock Web site, but it's better to do this after the simulation.
It's necessary to have Shockwave installed. It may take some time for the file to load, depending on the speed of your connection.
Audio is essential since the Web page content is read aloud. You'll need speakers or headphones.