Aside from the beautiful singing, this also shows wonderful communication among the players in the orchestra. Watch for the ways they use eye contact, to be able to play so well as an ensemble without a conductor.
Saw a boy a little rose, little red rose on the heath, young and lovely like the morning. So he ran to have a close look at it, and gladly did. Little rose, little rose, little red rose on the heath.http://en.wikipedia.org/wiki/Heidenröslein