It’s very easy to overlook water and hydration for people other than yourself. Especially when they can’t or don’t tell you when they feel bad.
I’ve had sunstroke myself before, mildly – didn’t realise it was happening until it was too late.
It’s not hard to put sun cream on is it.
It can be hard to reapply it every 90 mins or after every exposure to water, sand or a towel, mind. Which is what you’re meant to do.
My point is, give parents a break you sanctimonious b*stards. And no, my kids have never been sunstruck or burned, but they have fallen off stuff, wandered into trouble or eaten things etc when I wasn’t watching.