help need to find song in spanish! 10 easy points?

ok so i really like this song in spanish its a christmas song in where a little boy writes a letter to santa telling him all he wants for christmas is a little train he tells him that hes been good so why on christmas when he goes sees wat he gets he find s a little note from santa saying that well he cant buy it for him right then but soon he'll send it to him adn then santa says i do have a little train its brokened and doesnt have a wheel and the little boy says its ok just send it to me like that ill fix it

its a really good song makes me cry but idk da name of it

remember its in spanish! 10 points to whoever anwsers/ gives me da song first (the right one)