adventure of the flying brothers

Few things fascinate people more than flying. Since the dawn of time, humans have tried to soar through the air like birds. But how can this be achieved? Olli and Willi show us how. The two are brothers and have been tinkering with ways to fly since they were children. But it's not that easy, so they need a lot of patience to achieve their goal. Will the two of them finally be able to fly through the air like birds despite all the problems they face?