Simple Holiday song for very young children

This very simple Christmas song, aimed at younger children, has just been published on the Swirly Music website. It is in unison throughout, apart from a brief optional descant part near the end. Accompaniment is for piano, and a few simple percussion instruments may be added if desired.
The original version refers directly to Christ’s Nativity, and is suitable for inclusion in a church service or school concert, but there is also an alternative version in which the text is not specifically religious, for contexts where this may be more appropriate.
Click here for the original version and on ‘secular’ for the non-religious version.
(The SoundCloud recording is of the accompaniment, and may be used as a ‘backing track’ if desired.)