Small round objects seemed irresistible to some cats, but unfortunately they are the perfect size to block the intestines and then require surgery to remove them. (icatcare.org)
For example, is the black rounded object seen on the CT scan a gold object or a rock? (sciencedaily.com)
Not sure how I'll use it, or if I'll paint something on it, but I thought it might be neat mixed together with other round objects. (theletteredcottage.net)