Your cover
Get a large-format (square) scrapbook (or single piece of paper) to give you enough room, and design your own album covers - either for albums you might make yourself, albums that don't even exist, or redesigns of albums that do.
Use whatever method you want to make them - collage, photography, etc.
Consider adding a tracklist if it's an unknown or compilation album.
You could also do this with books you might make yourself, redesigns of favourites, or fictional books you found mentioned in other books.