The success of the Pet Rock has mystified consumers and would-be inventors for decades, and has become synonymous with the get-rich-quick scam. The ridiculous trinket has also inspired countless knock-offs and similarly inane, googly-eyed contraptions, with which harebrained hucksters attempt to make their own millions.

ThinkGeek is apparently putting a 21st century spin on that old Pet Rock by integrating it with another device famous for its absurd marketplace niche: the USB. Even though it really doesn't do anything, each unique USB Pet Rock costs $9.99 and plugs directly into a USB port. In the immortal words of P.T. Barnum, "there's a sucker born every minute," so someone will undoubtedly buy the useless thing. It may be time for us to reevaluate the 'World's Dumbest USB Gadgets.' [From: Oh Gizmo]