Ask any parent, kids love McDonald's. This year, the fast-food chain tugs at the heartstrings of any parent watching their “grow up to fast” with its new advert. It sees a little and her best imaginary friend Iggy grow apart as she turns into a young adult (and in heartbreaking scenes tucks Iggy away in her wardrobe). Somehow, with the help of a McDonald's Happy Meal, she remembers her former companion. And, well, not since Story have we felt so overcome with for our imaginary friends. sniff