Not all search engines display information in a textual manner - some of them allow you to view the data in rather different ways. These very often appeal to teenagers and students.

Kartoo provides a visual indication of importance of results and links between them. This was just about the first of this type of search engine and in many ways is the best. It allows you to easily limit a search, get an overview of a specific site and see the relationship between different sites.
Mooter provides an initial visual representation.
WebBrain displays a visual representation above, and links below
Quintura is a new engine offering a tag cloud based on results
Ujiko provides an interesting approach.
SearchCrystal is both a multi engine and visual in one go
Viewzi offers a wide variety of options