The IFAS visualized the meaning of fluid mechanics by a touchable aircraft turbine as well as a guided tour to the accessible wind tunnel. During the other part of the workshop, the students got the opportunity to try themselves on different questions from the field of mathematical optimization. The students tackled the Traveling Salesman Problem, the Graph Coloring Problem, and the Knapsack Problem among others in a playful way. Solving the problems was not only a lot of fun for the participants, but also for the staff of the IMO who stood by the students with advice and action.