The Indian in the Cupboard was one of the 'classic movies. My youngest child liked it so much my dad made her a "cupboard" for her Indian, when we bought the movie (it was included with the VHS). She even had an old skeleton key to open the cupboard.
A kid could get lost in the story the viewfinder slides tell. There were no sounds but I often could picture how it was and how it would feel like going with my favorite cartoons on an adventure. The Viewmaster