More to explore:
This picture doesn't show it, but this is a link to a cage-size calculator for small animals.
The cage calculator gives a guideline to how many rats your cage can hold. It's not set in stone. As a default it allows 2 cubic feet per rat for two or more rats, which gives results that generally coincide with the number of rats which the experienced rat keeper is happy to house in a cage. It doesn't take account of the number of shelves your cage has, as you can also add hammocks and other toys to use your cage to it's full potential.
The Best Way to Clean a Pet Rats Cage
Oh my, this would be adorable. ♥
Somehow the coconut hanging houses remind me of the aerial city in The Time Machine...but cool idea.
coolest rat cage ever. Oscar would be pleased.
Good accessories for pet rat cage; low cost, easy to clean! by serribrat
I would love to have a rat cage like this
Decorating for Christmas rat cage! I love how they used teething rings to hang the hammocks.
DIY rat cage
DIY rat cage accessories, natural wood
Rat Cage for shroomy