Um, why don’t they put some nice, fluffy white SAND on these playgrounds?
I assume they are already fenced, which would keep the cats out of the sand....
Most playgrounds are rarely fenced. Sand also gets in kids shoes and clothes.
Mulch like that used in landscaping often works pretty well for playgrounds. It clings to shoes and clothes less, but isn't mess free either.
Shredded car tires are also an option, but can get pretty hot in the hot sun.
Mats are likely easier to maintain, but black is pretty obviously not the ideal color for keeping them reasonably cool.