They also like to take old cloth and make into bedding. An excellent bed for your pet is a Quaker Oats box. Be prepared to change it periodically since the box can be transformed into bedding. The food dish needs to be heavy enough so not to tip over. The water bottle should have a chew guard designed for a rat.
Rats like to chew.
In fact, rats have to chew, in order to wear down their teeth. Rat gnawing blocks are great to hone down teeth. You can also use dog biscuits, rawhide bones and cooked soup bones. Your rat will need an exercise wheel, make sure it is big enough for a rat, about 14 inches in diameter. Make sure the cage is not in direct sunlight or in too hot of a location.