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Previous work in modeling curves and surfaces in augmented reality (AR) space has used expensive sensors such as magnetic sensors. In this work, we propose an augmented reality system where a user can model interesting surfaces with her hands, without expensive sensing systems. The system uses computer vision based methods for tracking the user's head and hand position. Using a glove and the tracking system, the user can draw smooth lines or surfaces with her hands in a physical space. The user can also intuitively modify the lines or surface created by pushing or pulling at the control points of lines or curves in a tangible manner.