I saw this topic over on another forum and thought that it might bring up some interesting suggestions.
I'm sure we all have at least one game that we played when we were young that left you scratching your head at what do to. That game for me was
Jack the Ripper for the Commodore 64. I remember loading it up a few times and having no clue what I was supposed to do. It was a text based adventure but that just didn't click with the 7 or 8 year old me.