It will however require the services of a competent patent attorney at a cost of around $1mm and approximately 3 years in a court in Eastern Texas to prove that they are in fact "okay".

Don't worry, we can start out by getting a judge to enjoin the probable infringement. We'll make sure no kids are allowed to attend elementary school during those 3 years.

This patent is also for tree branches. With chains.

Regular metal frames in playgrounds are exempted and so too are tree branches with ropes.

Wondeful! Lots of room for follow-on patents! (said the patent lawyer)