Interactive exhibit with Quiz about Power Plants for Home builders for Berliner Energieagentur. The visitor answers questions that appear on the screen. Correct answer: process routes and technical units (icons) light up. Wrong answer: prompt to try again. The Information graphic shows the technical components of a cogeneration plant with generator system. Icons show the different uses of electricity and heat (such as public power, household consumption of electricity, heating and hot water). The process paths are marked by colors (cold water: light blue, hot: red and power: green). Partly CNC-milled and with LED technology backlit.