Ermes is an astronaut living on the planet Mtx4. He travels from planet to planet to discover their characteristics.

Through this collaborative journey, the classes involved in the project discover their specificities. Each class represents a planet and Ermes will travel from one to the other by mail.  Each time, a page of text and a page of drawing will complete our storyline.

And when Ermes returns to his planet, he will have in his possession a magnificent travel book (which will be shared with all the inhabitants of the other planets).