Playing the Christmas song on the piano is a wonderful way to celebrate the season! The song is traditionally played in the key of C, and it's relatively easy to learn for beginners. The chords for the song are C major, G7, and F major. The melody follows the chords, with the right hand playing the notes and the left hand providing the bass. The song is typically played in a slow tempo, with a light, gentle touch on the keys. With a little practice, anyone can play this beautiful holiday classic!