This simulation allows students to interact with different components of a complex real world phenomenon. The simulation shown is of a 4-stroke internal combustion engine. The thermodynamic cycle being simulated is the Otto cycle, which involves an isentropic compression, an explosion at constant volume, a isentropic expansion, and the release of the exhaust at constant volume to return to the original pressure. The initial interface allows for interaction with the ideal-gas law portion of the simulation.