What are the interesting character traits of Digory in The Magician's Nephew?

Digory Kirke—the protagonist in The Magician's Nephew—is a very lonely young boy. He has no brothers and sisters, his mother's sick, and his father's away in India. So when he encounters Polly Plummer, he jumps at the chance to make a new friend. This shows us that Digory's quite a sociable boy, who much prefers the company of others, especially those his own age. Palling around with Polly allows Digory to indulge his vivid imagination and explore the strange, enchanting world his Uncle Andrew conjures up for him. Digory's innate curiosity is closely allied to his impulsiveness; he tends not to think too much before trying out a new experience. Thank goodness the much more logical, sensible Polly is on hand to help him out of his various scrapes.
As a young boy, Digory inevitably lacks something in the way of maturity. His patronizing assertion of superiority over Polly just because she's a girl is an illustration of this. But there's no doubt that he grows up considerably throughout the course of the book. Digory is subject to numerous temptations during his adventures which might easily trap children of a similar age. We see this when Digory is sorely tempted to to eat the fruit from the land of youth. But he refrains from doing so. Instead of being selfish and thinking only of himself, he wonders whether the fruit might help his sick mother to recover from her serious illness. Here, Digory shows not just maturity and compassion, but a real understanding of right and wrong.