I made a rice box for my Fred that works quite well. We play "hide the treat" once in a while and he enjoys it. It is a plastic storage box with lid, about 2 feet long and 1.5 feet high and 1.5 feet wide. (Approximately... I do not recall exactly.) In the bottom is about 6 inches of rice. I used plain polished, uncooked long grain white rice. Surprisingly, this is about 16 pounds of rice or maybe even a bit more. I got a 20-pound bag from my local wholesale store. That's about it. People make variations on this theme but that is all that is really necessary. I leave the lid off when the box is in use. Some people like to occasionally swap out the rice for the EDIBLE kind of shipping peanuts, for variety. The rice can last a long time as long as they don't soil it. I've had mine for a few years now. Your fuzzies might ingest a little rice in the process of digging or munching treats, but it passes right through them without harm. That's why it's important to use the hard uncooked rice. Lonny Eachus [Posted in FML 8011]