Most current virtual reality interactions are mediated by hand-held input devices or hand gestures, and usually display only a partial representation of the user in the synthetic environment. We believe that representing the user as a full avatar controlled by the natural movements of the person in the real world can lead to a greater sense of presence in VR. MetaSpace I is a virtual reality system that allows co-located users to explore a VR world together by walking around in physical space. Each user’s body is represented by an avatar that is dynamically controlled by their body movements. Users can see their own avatar and the other person’s avatar allowing them to perceive and act intuitively in the virtual environment.