What is "gymnase-enfantin"

The Gymnase-Enfantin or Gymnase des Enfants was an entertainent venue formely located near the Passage de l'Opéra (Galerie du Baromètre, leading to the Salle Le Peletier) in the 9th arrondissement of Paris. It had a capacity of 200 spectators. In 1840–1841 it was known as the Théâtre des Jeunes-Artistes and thereafter as the Théâtre des Jeunes-Comédiens.