Two tag-based authoring systems, A-frame on the client-side, and Molly on the server-side, when used together can dynamically generate web-based Virtual Reality (VR) scenes. A-Frame is a tag-based abstraction layer built on top of WebVR and JavaScript and is used to create virtual reality environments and applications that run in a web browser. Molly is a tag-based abstraction layer on top of PHP and SQL used server-side designed to facilitate construction of web sites and applications. When combined they enable the creation of sophisticated dynamic web-based VR environments. The VR Web Rocks! project is exploring the many creative ideas students can develop VR/AR using these technologies.