For my oldest child, it was Dominion Road by the Muttonbirds[0], that calmed him, and only that. It was sheer luck I found that out.

But, after having more children than you could fit in a regular car, I've realised that each child is an entire bag of quirks that don't apply to others.

[0]: https://www.youtube.com/watch?v=aCpXp6o8dnk