In July 2017, Google’s VR Division announced Blocks, a rather simple to use tool (an App available for HTC Vive & Oculus) that enables you to create + share 3D objects in Virtual Reality. The update for Version 4.0 published yesterday adds new Environment Options (themes if you prefer), Improved Snapping, and a Labs section with prototype features.
Check out some imagery courtesy of Google Blocks for VR.