Arrangements are written for a D Tin Whistle (not all songs are in the key of D, but written to be played on a D Tin Whistle)
 
Songs included:
Jingle Bells
Come, Thou Long Expected Jesus
Silent Night
Angels We Have Heard on High
Joy to the World
The First Noel
Away in a Manger
What Child is This?
O, Little Town of Bethlehem
O Come, All Ye Faithful