I agree with PaperPrincess. Make sure your fabric you chose is the best that will endure being washed and will be able to be used on a quilt. Such a disappointment if the fabric fails on the quilt. I think if you found the correct shades of gray, the dolphins would still delight your GD and GDD. How about finding a printed dolphin on fabric??
https://www.google.com/search?q=dolp...ih=614#imgrc=_