Linux Demos?

Sits asks: "Every year my univerisity's computer society hopes to entice new students to join by running a computer display. Last year we ran Q3 test on a Win98 system, but this year we would like to demo something running on Linux. Does anyone know of a flashy way to demonstrate Linux to regular people? Does Linux have an active demo scene and if so would a display of those be appealing to non-technical users?"