Ardif worked for several weeks with students from the high school Joliot-Curie. They chosed the animals for the composition and the building of Nanterre integrated in the mechanical parts. They also helped him during the process of the wall painting. . This project was also in collaboration with the Louvre museum and the Nanterre city council. The lion and the frog are like a fable telling the story of the people of Nanterre.