These cute, pixie-shaped thingamajigs spontaneously assemble out of technological garbage. They're sometimes associated with hyper-intelligent raccoons, but the raccoons aren't responsible for making them. Some raccoons consider them to be disruptive pests, while others tolerate and even treat scrap pixies like pets.
Scrap pixies are playful, and it's easy to dismiss them as harmless. But they can also be mischievous and like to disassemble technology, which can cause all kinds of problems.