It was the first "big" chapter book we read to him, a long time ago.
(We tried reading other Narnia books, but none of those interested him.)
We owned the Narnia audio books, and after reading him The Lion, the Witch, and the Wardrobe put that on his ipod shuffle (second generation).
That has been his audio book choice ever since. Until he started kindergarten and stopped napping, he listened to it whenever he had trouble falling asleep at nap time. He still listens to the story a few times a month, after school when he is tired but does not want to nap.
Last December he got to see the Adventures in Narnia ballet performance. It was wonderful. He still talks about it.
Parts of the performance were scary, but he was brave and kept watching.
This weekend he gets to see it again. Exciting!
I wonder how the story changes for him as a five-year-old, compared to last year when he had less practice with courage, less understanding of temptation, and less experience with living in a snow-covered place.