I've used a layer cake from Sweet. I know what I'm going to use for the center, but I don't have that fabric. I did hand applique the first block and used the fabric I'll use for the center on that, but I only had one layer cake square. I'm not done, but I'll show a picture when I am.
I'm loving this line. It's so much fun and so, so springy! Just what we need at this time of year.