This jazzy, mellow arrangement of "O Christmas Tree," or "O Tannenbaum," has been retitled more appropriately for its purpose, "O Tannenboom." Written specifically for Boomwhackers®, it features them playing a modified version of the melody to some very hip tracks. There is also a harmony (the lower notes) which you can use or ignore, as you see fit. (from Music K-8, Vol. 18, No. 2)