Tonight with your 5 to 8 year old
The prompt
“What does being a good sport mean to you when you lose a game?”
What to listen for
If they can describe it, shaking hands, saying good game, not throwing a fit, they already have real internal standards for how to handle disappointment gracefully.
If they admit it's really hard and they don't always manage it, that's honest and valuable; it means this is a skill still forming, not a character flaw, and deserves patience.
If they say "I don't know," ask about someone they've seen lose gracefully, like a sibling or a character in a show, as a model to talk about.
What this tells you
How they define good sportsmanship shows whether they're starting to value fairness and connection over needing to win every time.