Bird Cage Mansion.

http://www.instructables.com/id/Bird-cage-mansion/

That seems like a good idea and the cage itself looks great.

Though I'd be worried about the stains/varishes/paint used on the wood, plus wood is a pain in the butt to clean!

Thats a very cool cage. I don't know if I'd call it a "Mansion" though...

I suppose it would be a mansion if he was raising little finches.

 

I too would be concerned about the paint or varnish used on it. It was still interesting to check out.