Getting your Trinity Audio player ready...Photo: An adventure playground in the Netherlands. FamVeld/ShutterstockMy first thought upon looking at a photo of Adventurous Construction Playground Kolle 37 in Berlin was “The Little Rascals,” circa 1994. It’s the democratic process.”The research behind adventure playgroundsThe Adventure Playground in Berkeley, CA. Research supports this kind of “risky play,” says Ellen Beate Hansen Sandseter, a professor of early childhood education and co-author of the book Risky Play: An Ethical Challenge. “[Kolle 37] is a really, really special place,” says Schmidt.