You've seen Fingerlings. They're the colourful monkey, sloth, or unicorn clinging to all those prepubescent fingers. Their sensors and AI allow them to react to gestures and sounds, so they can chat, kiss, snore, and even fart. They're a hell of a lot cooler than a fidget spinner and they're about the same price. But if you want to buy one now you're probably shit-out-of-luck. Fingerlings are out of stock at almost all stores, and they're selling on eBay with prices ranging from double the original to as much as $US5,000.