Ron writes a letter to his Ron Parents(Character). He writes:
"Dear Mr. & Mrs. My Parents, I miss you. Hogwarts is fun. I am learning magic a lot. See you at Christmas. ---Ron."
When Harry finds out about it, he becomes jealous because Ron's parents are still alive, while Harry, on the other hand, has dead parents. To cheer him up, he gets Ron to sing him a song. When he finishes, he asks Harry if he wants to come over to his house on Christmas, and Harry quickly says "yes." Then the episode ends.