My kids and I heard The Lion, the Witch, and the Wardrobe on audiobook one road trip a couple of years ago. When I decided recently to read the whole Chronicles of Narnia to them, I decided to start anew with The Magician's Nephew before we re-read Wardrobe and work through the rest of the series. 
 I'd forgotten how delightful this series is. It kept both my 8.5yo and my 4.5yo entranced, even through long-ish breaks between chapters. 
 I read the series before I read Lev Grossman's The Magicians, but it had been a couple of years. Now that this book is fresh in my mind, and we're starting on the rest of them, I might go back and re-read The Magicians.