That's cool Justin. I have an old Fisher SC-300 portable stero system, that has a small keyboard ontop, that can be removed to play it. Or it can be left attached to the system, as it plays through, the systems speakers. I have had it since I was 14 years old. Of course by now it's become a bit tempermental, and the main volume has gotten scratchy from dust over the years, but it still works.
For awhile I had a nice collection of mini, and mid size Casio Keyboards, all of whihc I have since sold. Never realized, there was such a demmand for them. I used to have a casstte tape player, that I used to just record into, althought it had no way to mainipulate the tape. Plus I had my share of larger Casio and Yamaha, homw keyboards, that I have sold as well, but never got much money for them, as I did with the mini ones's. Go figure?
Paul