Any suggestions on how to improve my mice's home?

once a week after you've cleaned the cage re arange the stuff in their cage so it doesnt get boring. When toys get chewed alot and arent too good anymore get them new furniture, give them new treats all the time to taste. Also it would be good to put some braches in the cage, so one half is on the ground and one half is up the side of the cage/tank, they love to climb. There is also alot of fun mouse furniture that you can buy for mice at petstores.