If you are a glider owner or flying squirrel owner.hit up local yard sales or thrift stores for old dresser or amours. They make for great cages and even storage for clean towels, food, treats and toys.
You'll have a wonderful crop of grass'' in under a week. Cut a difficult parcel of fabric to size. You might locate these free somewhere, or they're just a few dollars to purchase new. Then there's the extra bonus of locating a treat.