Major Morgan was a hand-held electric organ with music cards that you could place on the front and make music with. I had one when I was younger and found it very hard to use. Major Morgan came with around 10 music cards and was shaped like an an army Major.
When you slotted a card into Major Morgan the top section had a series of different coloured shapes or numbers in what looked like a random sequence. However, the shapes or colours in the bottom half of Major Morgan, when pressed according to the key sequence would make a tune. Each card was double sided so would contain two songs. However, there was also a blank card so you could make up your own card and record the key sequence.