Together with Ralf Haefner and Eckart Arnold I headed a one week spring school on the role of simulations in neuroscience with undergraduate students supported by the German National Academic Foundation. The goal was to discuss (1) what simulations can contribute to generating knowledge and (2) if there is such a thing as a right level of abstraction, both from a scientific and philosophical point of view. The school was located in beautiul Annency in the French Alps, close to Geneva. Therefore, we spent a day on a field trip, visiting Felix Schürrmann of the Human Brain Project in the morning and Alex Pouget of University of Geneva in the afternoon. The students spent also time performing simulations themselves, diving into the details of Integrate&Fire and Hodgkin-Huxley neurons. A great in week in a spectacular setting!