I heard a researcher speaking on how litigation against playground owners in the 1970s in the USA over injuries and in one case a child fatality drove the more stringent playground regulations. However, the unintended consequence was an increase in children's long bone injuries, and her research suggested that this is due to kids not learning to navigate risk on the "safer" playgrounds and eventually getting injured elsewhere where the ground isn't forgiving like all the artificial playground surfaces.

Take you kids to play in the woods!