High up on the nursery shelf, tucked behind a fluffy blue block, lived Bip the little copper robot.

His home was the Attic of Soft Echoes, a place where forgotten sounds came to rest on velvet pillows.

Every evening, Bip would twist his tiny key to release his special 'click-clack'—a sound like two smooth pebbles dancing—which turned on his gentle Sleep-Light.

But tonight, when Bip twisted his key, there was only a soft, empty sigh. His chest plate remained dark, and his little metal heart felt quite worried, for he simply couldn't find his rhythm.