Gerbils do best in cages formed by a solid container with a wire top for ventilation. Gerbils need several inches of bedding to be comfortable. If the cage is composed entirely of wire, the bedding, which can be sawdust, cotton pieces or a similar material, can easily fall out of the cage. Also, gerbils are native to warm desert climates. A closed glass or plastic container is warmer than open metal and is a preferable gerbil habitat. Closed container gerbil cages are available in pet shops, but you can also make them yourself.
Cut a square hole in the plastic box lid using the box cutter. Leave several inches on each side of the opening.
Cut a square of wire netting large enough to cover the open square with a two inch margin on each side, using the scissors. Lay the square of wire netting on the lid.
Tape the wire netting to the lid securely using the heavy packing tape. Use several layers and cover all sharp pieces of wire.
Place cover on the base of the cage. Make sure that it fits securely so the gerbil cannot push it off from inside.
Fill the bottom of the cage with wood shavings or rodent bedding, available at most pet stores. The cage is now ready for your gerbil and its accessories. Make sure your gerbil always has fresh water available. A hanging water bottle is the best option for a cage of this type.
Clean your gerbil's cage frequently to keep it smelling fresh.
Do not use cedar shavings for bedding --- they are very dangerous to gerbils. Do not tape the lid to the base of the box.