In Erica Gaudillère's classroom at Exen Pire Elementary School in Schiltigheim, Alsace, students can't stop glancing toward the back of the room. Since last month, that's where six white mice have been spending their twilight days in a cage, after having served as research subjects.

The pilot project, named Merci – for "Muridés en retraite chez les instits" ("Retired Rodents with Teachers") – was conceived by Ethosph'R, an organization working with professionals concerned with mitigating the impacts of their research. The organization was chosen, among others, to transform the Orangerie Zoo, which closed three years ago. In its allocated space, which will open to the public in 2026, Ethosph'R plans to welcome other retired lab animals: chickens, rabbits and even pigs.

The scientific approach is one of the guiding principles of their methodology, with rigorous rehabilitation and monitoring protocols. At Exen Pire School, four classes (second and third grade) are involved. Teachers have assigned tasks to the children, such as changing the water, giving treats or adding hay.

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