Harass co-workers with USB missiles

With these USB-powered air darts, you can shoot to annoy. Just hook the contraption up to your PC and control the darts' aim and firing mechanism with your mouse.

Credit: Marks & Spencer

We came upon this high-tech version of the paper airplane on digg, and with the holidays coming up, felt it deserved a mention. Digg readers had some pretty funny observations on the gadget, including, "Be careful if you toggle your left and right mouse buttons. You just might kill yourself."

The Web site for British retail giant Marks & Spencer sells a set of the darts for 19 pounds 50 pence (around $34). Three darts come with a cylindrical base and included software. Ready, aim, fire--but please, be careful not to take anyone's eye out.