“Hot” was our kids’ warning word when they were little. It worked much better and faster than “No.” Don’t know why since they were never burned.
Apparently, parents can’t be bothered to get their noses out of their phones to check how hot the slide might be.
Putting a shade over the playground also deprives kids from the Vit D they get from the sun.
And the “shade” deprives them of the learning experience of “direct sunlight makes things hot”!
Scuffed up knees, elbows, bruises, sprained ankles, blisters, bee stings, mosquito bites, poison ivy, etc. are part & parcel the lessons & memories of childhood!