A Swiss art exhibition center finds sophistication and the potential for modern art in a most seemingly ordinary place: children’s playgrounds. The Kunsthalle Zürich, a center known for seeking to break boundaries in art by redefining its concepts, has begun crowdfunding The Playground Project, a book that will explore the history of playgrounds and exhibit photographs of what the center deems the most beautiful playgrounds in the world. The project for the book was conceived after the center began planning an exhibition where it would transform several spaces into playgrounds; the accompanying book is an attempt to immortalize those spaces…