@Pythonista are you always this negative, dismissive and supercilious about anything that is incredibly popular? Do you look down your nose at other populist music/books/films?
I appreciate that it might not appeal to you, but to dismiss it as "shit" and "only for kids" just makes you sound rather snobby and unpleasant. I dislike films with violence, and hated Pulp Fiction, but I don't dismiss it as shit. It just isn't my kind of thing.
I read my first Harry Potter book in 2001 sitting next to a cot when in hospital for several weeks while my 6 month old baby was very ill. It got me through that time, and I avidly read all the subsequent books and enjoyed every one.
I also enjoyed reading His Dark Materials, then when DD was old enough reading Enid Blyton, the Narnia books, Lemony Snicket, plus loads of other books to her. I got as much out of them when reading to her as I did when I first read them many years previously.
I even enjoyed re-reading the Laura Ingalls Wilder Little House books, which I first read as a child, after a big discussion on mumsnet.