Copenhagen is at the top of the list of livable cities. Charming and also grand, the city is inviting and its citizens remarkably welcoming. Now the Danes are laying claim to the title of the city being the best place in the world for kids to live. Their deserved hubris is documented by a new exhibition at the Rem Koolhaas designed Danish Architecture Center. Kids City boasts slides and rides in a kind of real life Legoland and allows kids and grownups alike to understand the elements makes this creative metropolis work so well.