Strictly for fun and holiday spirit, we have blended an optional vocal melody with Boomwhackers® in this distinctive arrangement of "O Christmas Tree." The vocal part is super simple and uses only the syllable "loo." You could also have singers perform on kazoos instead of singing. For more options, any C instrument could also play the Boomwhacker® part(s). The Boomwhackers® are divided into optional parts. If you have beginning players, just use part 1, which is the melody. If you have more advanced players, add part 2. (from Music K-8, Vol. 13, No. 2)