Casey was a 'talking' robot made by Playskool in 1985 that had a built-in tape recorder and digital display for his face. Casey could operate as a standard tape player or could operate in story mode if you flicked a mode switch on his head.
When in story mode you could play special story tapes that came with Casey that would automatically pause at certain points in the story to let you carry out a 'special activity'. You could restart the story when you were ready by pressing his tie (which was a GO button).
Casey's mouth moved and responded to the tape that was being played. The louder the volume, the wider his mouth!