Edusim is a cave automatic virtual environment "Immersive Touch" 3D natural user interface (NUI)-based concept of lesson driven (multi-user) 3D virtual worlds on the classroom interactive whiteboard or classroom interactive surface. The Edusim concept is demonstrated by the Edusim free and open source multi-user 3D Open Cobalt virtual world platform and authoring tool kit modified for the classroom interactive whiteboard or surface. The Edusim application is a modified edition of the open source Open Cobalt Project and relies heavily on the affordances of direct manipulation of 3D virtual learning models and constructionist learning principles.