Ferro Pet, the new virtual pet made of iron filings, is a delightful mashup of Tamagotchi, pet rock, and Sea Monkeys, trading neediness and weird shrimp for magnetic whimsy. If you crave a roommate with zero emotional baggage but plenty of magnetic charm, this oddball invention is your weird news fix. Ferro Pet’s surge in popularity is proof we’ll adopt absolutely anything—if SEO and virtual pets are involved.