La llavecita dorada (The Little Golden Key)

One Saturday morning, the Mouse brothers set off in search of adventure. They were very happy: the big one, the middle—sized one, and the little one. Next to the path, they saw something glittering, like a little piece of the sun. It was a little golden key. But what did it open? Could it be the key to a pirate’s treasure chest? Would it open the gates of a gigantic medieval castle? The three brothers, restless and eager to find what the key opens, will embark on an adventure to solve the g...