Simple to play arrangements of Christmas pieces are here.
This was written by Napravnik for piano. Other people have arranged this for Piano Trio and String orchestra. I heard the piano trio version on YouTube and thought it very effective, so I arranged it for Piano Quartet (Piano, Violin, Viola and Cello). I then played it with some friends and it works very well and is easy to play.
Full score and parts of my Piano Quartet arrangement are here.
The video below shows the original piano score next to my arrangement scored with Sibelius notation software. The music software I arranged this in is StaffPad. The sounds are from the Berlin First Chairs library and stock StaffPad Piano.