One memorable moment is when he goes to see Santa at the department store. He's so excited and nervous at the same time. Another is when he writes the essay about the BB gun for school. It shows his desperation for the gift. And of course, the moment when he finally gets the BB gun on Christmas morning is really great.
Ralphie's visit to the Chinese restaurant on Christmas is a very memorable moment. It's so unexpected and adds a unique touch to the story. His moments of waiting in anticipation for the Christmas presents, especially for the BB gun, are also great. And when he first unwraps the BB gun and his eyes light up with joy, it's a moment that really stays with you.