Heartwarming / The Lion, the Witch, and the Wardrobe
Aslan's resurrection. Readers will likely have a lump in their throat either in the book where Aslan joyfully rumbles "Yes! It is more magic" or in the film where he's silhouetted by the sunrise.
Lewis' opening letter to his goddaughter, saying that by the time he's done writing the book she'll probably be too old for it, but eventually she'll be old enough for it again and can read it back to him.
I wrote this story for you, but when I began it I had not realized that girls grow quicker than books. As a result you are already too old for fairy tales, and by the time it is printed and bound you will be older still. But some day you will be old enough to start reading fairy tales again. You can then take it down from some upper shelf, dust it, and tell me what you think of it. I shall probably be too deaf to hear, and too old to understand, a word you say, but I shall still be
Lucy and Susan being with Aslan to comfort him when he goes to die on the Stone Table.
There's also the scene where Aslan and the girls invade the Witch's castle and restore all the petrified victims of her evil magic. There is a joyous power to see that there is little harm that the Witch can do that Aslan cannot undo.
After the Pevensies are hiding in fear of an approaching sleigh (presuming it could be the Witch), Mr. Beaver braves a look and then merrily tells everyone to come out. It turns out the sleigh is Father Christmas' instead, who is finally able to enter Narnia after so long and he has presents for everyone.
Mr. Tumnus and Lucy holding hands at the end.
Just look at Lucy's face when Aslan calls her "Queen Lucy the Valiant."
Peter being a good brother and putting Lucy's coat around her shoulders when she gets drenched. Awww...
The first stone victim the girls see in the Witch's castle is Mr. Tumnus. In sharp contrast to the book, when she knows Aslan will resurrect him, Lucy starts crying, thinking he's dead. Then, Aslan turns him back. Cue hugs all around.
Also when he is turned back from being stone, he falls into Lucy's arms, and she is the first person he sees. Lucy then attempts to introduce Susan to him but Susan interrupts her saying "Mr Tumnus, I know" and throws her arms around the faun she's never even met.
Anytime the Pevensies hug. Especially Peter in tears after Edmund comes back from the dead hugging his brother.
The heroes are about to charge into (a seemingly hopeless) battle.
Peter: For Aslan and for Narnia!
"We just want our brother back."
"Once a king or queen of Narnia, always a king or queen. May your wisdom grace us until the stars rain down from the heavens."
Peter to Edmund, after Lucy heals him.
Peter: When are you gonna learn to do as you're told?