The album includes two stories told in Catalan and set to music by Xavier Montsalvatge. Viatge a la lluna, premiered in 1966, has a story written by Josep Maria Espinàs. It recounts the adventure of a group of children who build a rocket to go to the moon. El arca de Noé, with a story written by David NelÀlo, has a structure similar to the well-known tale of Peter and the Wolf. A series of characters (animals) parade through the story and are each represented and identified by a piece of music on the piano. The CD booklet includes the text of both stories.