There is nothing wrong with the children particiipating in the song, as long as the parents approve.
Is that really true?
![doubt :doubt: :doubt:](/styles/smilies/doubt.gif)
Having seen the number of times that schools with a predominantly Christian student body are prevented from celebrating Christian tradition (for example, not allowing the kids to do a nativity show for Christmas, or not singing Christmas carols), I wonder where the line is drawn.