If you want to know what a geek is passionate about, look at their chest. Chances are good that whatever their passion is, it will be emblazoned across the front of their shirt in some form or other.

Here’s another geeky T-Shirt to add to your geek wardrobe, the Drum Kit T-Shirt. The Drum Kit T-shirt has a built-in speaker and volume control in a hidden pocket and runs from 4x AAA batteries. This ...