I'm always at a loss as to what to do with soap scraps. I don't have as many as I used to (back when I had to trim the backs off HP soaps). Since I'm not under pressure to come up with a wonderful solution, I've been turning scraps into stones.
I like the rustic look of soap stones, and so do my customers. I tried for ages to sell soap balls, but they wouldn't move. The stones sell well, though. The stones above were made awhile back using natural vanilla soap scraps. The veins and specks are vanilla paste which was added to the soap after the cook.