Demonstration Speech Suggestions?

Question

I need to give a demonstration speech for speech class. Does anyone have any suggestions? I'd like something unique preferably science related that would only take about 3-5 minutes.
Any help is appreciated!!!!!

The speech needs to last 3-5 minutes...I can prepare for as long as I'd like.

Answer 1

since you are limiting the time, give a speech about how you prepared to give the speech you are giving and stress that it only took you 3-5 minutes to prepare.