From the way Cruella explained it, I would assume that only magical objects are in a sense “alive”. The magic inside of them is a life force in itself. I guess you could compare it to plants, which too are inanimate objects, but still have a life force. Would Chip be considered a magical object, though? The pen has unfinished business because Henry still has duties as the Author, and I guess Chip could have unfinished business in regards to Rumbelle’s relationship.