KIM HARRISBERG  INSPIRED by a virtual reality tool that allows users to experience cities from the height of a three-year-old, a new set of guidelines aims to show how urban design can improve the health and security of vulnerable children. Bringing together practical tools and examples for urban planners and governments, the Proximity of Care Design Guide was launched this week by global design firm Arup and the Bernard van Leer Foundation, which focuses on childhood development. The guide builds on the virtual reality (VR) initiative Urban95, led by the foundation and Arup, which places users in a fictional urban…