Even before the official opening of the Long Night of Sciences in the Biocity Leipzig until after midnight, the information booth of the Life Support Systems-group of ICCAS was an attraction for visitors. The scientists experimentally explained the function of Electrical Impedance Tomography (EIT), a gentle imaging method based on measurements of electrical conductivities in the human body. Many guests came especially to fasten the measuring belt and to watch their own lung function in the live image of the EIT measuring device. The children’s rallye attrackted the youngest and their parents to the booth. They had to answer the question: How does soemthing look like in the “electrical” image?