Monitor_Spinner_II.jpg
From the MAKE Flickr pool

Member funnypolynomial built a very simple, heat driven motor that sits atop an LCD monitor bezel. It’s actual a revision of an earlier design for use with CRTs –

The original Monitor Spinner did its thing on a giant CRT and was prone to falling off, especially if I turned on the fan in my cube.
I was pleasantly surprised when I got my flat LCD monitors and found they still put out enough heat to make it spin. I decided to make a second version, less susceptable to breezes.

He’s also posted a template for download. Print, cut, add a metal wire with a sharp point, – prepare for numerous comments from your coworkers. – Link

From the pages of MAKE:
Curie_Engine.jpg
HOW TO – Curie engine – MAKE:09 p.114 – Link