A set of knitting needles which are haunted by a ghost of someone who was almost certainly a knitter who passed away with unfinished projects; they can be found at night, whenever yarn is available, knitting away, their specific identity obscured by the passage of time and the gradual narrowing of focus. The fact that they knit things to fit the people in the house suggests that they've almost certainly finished the original projects that kept them bound - but like most crafters, they've just kept adding new things onto their project list. Perhaps, if one prevented them from knitting, they might eventually fade away, but no one has been willing - it seems a cruel way to send them to rest, and the new socks every winter are very nice.