Tonight with your 5 to 8 year old
The prompt
“What's a fair rule about borrowing someone's stuff without asking first?”
What to listen for
If they suggest asking first and returning things in good shape, that clear, fair rule shows they understand respect for other people's belongings.
If they bring up a specific time someone borrowed their stuff without asking, let them vent that out, it's often still bothering them and naming it helps.
If they say borrowing without asking is fine, gently ask how it would feel if it happened to something they really loved.
What this tells you
The rule they propose shows how much they need their own things, and other people's things, to be treated with real respect.