If a child was throwing sand in a play area what would you do

Would depend on if they are just throwing it in the air away from other kids or at other kids.

I talk to people's children if you won't. They listen to strangers because they aren't comfortable with us. Works almost every time. Or the parents get embarrassed and properly correct/remove their kid. If you won't do it, I'll do it every time

I would remove my child from where the other child is playing. I tend to avoid confrontations with strangers unless I absolutely feel it’s necessary.

It’s not my place to parent another child, I would just remove mine but probably be passive aggressive and say something loud enough for the parents to hear like “let’s get you out of here since he won’t stop throwing sand” lol