In early 2016, following on from my work on an approachable 3D construction tool, I spent some time prototyping a simple Virtual Reality construction environment. In this video I outline my goals for the prototype and demonstrate my solutions for creating an intuitive building interface within the constraints of the Google Cardboard platform. As Google Cardboard uses just one button, and head movements, for input I was particularly interested in exploring how an intuitive interface for single-button 3D construction might work. Subsequently myself and a team expanded on some of the concepts in this prototype in Singapore with our Masterpiece Mammoth prototype.