This is a more general question, not JUST about the Spirit theme.
Which themes "come" with a basic child theme included? If any.
I've read that they aren't hard to create. If so, why not include them "with" each theme you create?
I for one would appreciate having theme come with the themes.
Would this be do able? If so, could you start with the 3 newer themes. Spirit, fixer, and scribe?