Bridging the gap between textbook and laboratory learning, CircuiTUI leverages the power of both advanced real-time circuit simulation and the hands-on and the collaborative atmosphere of a laboratory. With CircuiTUI, projected images of circuit components are bound to physical objects that can be modified or re-organized in a virtual circuit. The physics is continuously modeled, and is overlaid graphically over the components and wires as both quantitative displays and qualitative visualizations. CircuiTUI can help an expert experiment quickly, as well as help a novice learn and develop an intuition for circuit design.
(Source: http://tangible.media.mit.edu/projects/circuitui/)