I have a large box I keep for orphaned blocks. There is also a group of swap blocks that somehow got in there. When I have enough blocks in whatever size I make them into a sampler quilt. I made a king size quilt one time out of orphan blocks. It came out so ugly, in my opinion, that it was beautiful! People were falling in love with it while I was questioning my sanity! I'm just saying that all your extra blocks can become a beautiful quilt no matter if there is a theme or not. Hold onto them and make your swan.