Cover the cage floor with a thick layer of bedding. Wood shavings are best, because they are absorbent and nontoxic. Keep the bedding warm and dry moisture can cause fatal infections. Keep a filled, clean water bottle attached to the side of the cage. Provide plenty of chew toys.
Hamsters love the cardboard tubes found inside rolls of toilet paper and paper towels.
Attach hamster wood chews to the side of the cage. Make a small box for your hamster to sleep in. Cut a 2-inch doorway into a closed box. Place the box in a far corner of the cage. The hamster will fill the box with bedding and chewed-up pieces of cardboard from the toilet paper tubes and will use the box as a bedroom.