Another round robin I worked on was Lisa's under the sea block. I did this entire block. Part of the seaweed I had some funky yarn/thread which I crocheted a single chain stitch and tacked it down.
I really had a good time with this block, of course it is one of my favorite subjects.
Lisa had all her blocks in the shape of shells, and is planning to assemble them into a fabric book. I really loved her idea.