PIC-NIC (1952). Zapo is a soldier who feels alone and frightened on the battlefront. When the fighting stops, he takes out his tools and begins to knit. The telephone that gives out orders rings. Zapos parents appear on stage, Mr. And Mrs. Tepán, who have decided to spend their Sunday on the battlefront with their son. The picnic is interrupted several times. First of all, an enemy soldier called Zepo arrives and is taken prisoner. Later, the two stretcher-bearers arrive, looking for the injured or the dead. Zapos parents visit to the front leads Zapo and Zepo to realise they are enemies. From this moment on, all the characters try to find a solution to the war. The Yale Cockroaches or Princess Pitusa (1986). The Duke of Badajoz, a male specimen from the faculty of Biology, has its feelings centred on Princess Pitusa, who is a student of Religious and Social Sciences. During three scenes, the Duke flatters the Princess in three different ways in order to win her favour, each way culminating with a different song: Amado mío, Granada and La Cucaracha.