The walls of the first exhibition room are adorned with wallpaper. Its pattern was created from a reproduced drawing of a lemon. The learners find more fruit in the following exhibition rooms: skilfully painted in small-format paintings, they discover the lemon in a variety of forms in a landscape, in a fur cup or as a peeled version. In the video Sweet Lemon Ballade, the artist herself appears dressed as a lemon. The film tells of the eventful adventures of the sweet and sour fruit. Before the pupils watch the film, they come up with their own story based on one of the fictional film posters painted by Klodin Erb.