Broadway Music to Help ASD physical aggression


I'm a psychologist working in behaviour support with some pretty complex cases.

I recently met a young boy, mostly non-verbal ASD except he sings in classic broadway style. It's almost spooky, like he's inhabited by memories of a past life singing on broadway. Sounds ridiculous I know... but as part of his behaviour support I was hoping to find a broadway-esque song about "not hitting" or "being gentle"...?

I saw a thread here about songs of friendship and so I'm trawling through some of them. Just not sure they'll quite fit the bill. If anyone has a clue about what I'm asking and a song that may suit to teach this little boy instead of hitting people - I'm sure you could feel my appreciation wherever you are.

Many thanks in advance,