Follow the lights on the USB dance mat but beware, it gets trickier as the lights get faster! The USB Finger Dance Mat work with Windows XP, Windows Vista and Mac computers. (via drinkstuff.com)

Here is a great way to practice your DDR moves at work. Awesome time waster and desk decoration. You keep up with the lights and it will get progressively more difficult. Try not to get caught dancing on the job!