Every year, about 220,000 kids younger than 14 show up in U.S. emergency rooms with injuries from a playground. That's just the ones who go to the ER. Others seek care at their pediatrician's office, ...

If you grew up decades ago, playgrounds came mostly in basic shades of black and gray. Metal equipment, dotted by rust, offered a selection of the basics — typically swings, jungle gyms and slides, ...