i would say a hamster wheel a chew log or a cat toy ball with a bell in it.
Buy one a cage and put it in it, then the other one can play for a little while, then put the one you let play back in the cage then get the other one out to play.
You can put it back in its cage after it takes a bath.
In a big cage
You should house your pet rat in a cage with aspen shavings for bedding. A water bottle and a food dish. Don't put the cage in direct sunlight or near any drafts. It is best if you 2 get rats at one time so they can keep each other company while you are not home to play with them. You can put some toys in the cage for your rat to play with. The cage should be 2 feet by 2 feet by 1 foot for each rat you own.
You should just put it in a cage.
you should find its cage put the animal in the cage and take underneath a table with you.
A mouse can have a litter of 8 to 10 babies; some more, and some less.
it all depends, i mean where else will you put him, if you give him love and good food and toys to play with then no he should be perfectly happy
you should put grasses, a leaf or stick or two, and a lot of dirt
You can put a new mouse in the same cage as another, but if your mouse prefers living alone, don't put the mouse in the cage. The older mouse should be better off solitary.
yeah i really think that;
A wooden house that you can put in their cage with them.