Singing soothes our babies:
https://www.utm.utoronto.ca/main-news/sing-song-soothe-your-baby

Is good for our children in the classroom:
http://www.musicalfutures.org/musical-futures-blog/10-reasons-why-singing-should-be-in-the-classroo

and isn’t just great for kids, but as adults it helps us to bond socially:
http://www.ox.ac.uk/news/2015-10-28-singing’s-secret-power-ice-breaker-effect-1