Pop Up Parks is an awarding winning social enterprise that works with families to turn city streets into playful and creative spaces. We've been involved right from the very start, designing and making free form park apparatus that is easily reconfigured and evolved by kids. More recently we transformed a paramedic ambulance into a mobile headquarters , refitting the interior as a workshop and storage space. It was important that we worked iteratively, responding to what we observed at each pop up event. We focussed how we could use both low cost and natural materials to create an intriguing and fun experience for kids and their families.