The sign should say- "go have fun, watch that you don't ram into your friends!"
Instead, (i'd show you if I weren't too lazy to walk the quarter mile back to the playground equipment)
it said" don't let your kids wear anything with strings because s/he might hang themselves
don't let your kids sit on the slide if it can cook eggs
don't let your kid slide with a knife
don't let your kids climb on the top of the ladder with a pole to balance
don't let your kids wrap a bag around their head and try to breathe while on equipment
don't let your kids swing in circles and ram into their friends
don't let your kids play if equipment is jagged and knife like
don't let your kids play with guns while on playground
don't give your kids bullets
don't let your kids lick the pole because of salmonella
don't let your kids eat paint
get it? Our country is such a sue/court happy country that I am sure the playground maker had been sued for every one of these things.