Tonight with your 9 to 12 year old
The prompt
“What do you think fairness between siblings should actually look like?”
What to listen for
If they give a nuanced answer, like fairness doesn't always mean identical, they're maturing past simple "equal treatment" thinking into real fairness, which is a big developmental step.
If they argue hard for strict equality, they may be feeling like they're currently getting less, and want that noticed and named, even if nothing changes right away.
If they say it's fine as it is, take that as real information, but keep watching for whether small resentments show up elsewhere.
What this tells you
This shows you how they're defining fairness for themselves and whether they currently feel like they're getting their share of it.