We've had a sandbox for our ferrets for years now. Next to the dryer tube, the sandbox is their favorite. Like yours, our ferrets love to dig and make patterns. Sometimes I hide one of their toys in the sand and they are quite surprised when they dig it up. We use a sterilized children's play sand in a Mr. Turtle wading pool. Oh we do get some sneezing every once in a while when the sand gets up their noses, but their ancestors were digging animals and I figure they are well evolved to handle a little sand up the nose. Dick B. 4 Li'l Paws Ferret Shelter [Posted in FML issue 2606]