Oh, Hannah, I hadn't thought about the holes in that - perhaps I should just wait until I have a glue gun and jenga bricks and make the crazy contraption that Wofunny did.
Thanks!
A tube city isn't a specific thing I just meant it as lots of tubes going everywhere! Just extra places for the hamster to explore. Perhaps expandable to more little rooms.
Unfortunately, Katarina, it is a roof opening. And I was tempted to put the tubes in there, but then realised if I wanted to get in there to get to Sen I'd have to disconnect the tubes (that, and from the roof it would be a big drop from the inside as the FNA doesn't allow tubes connected from the inside (which I'm not sure why not really!). I think the cage is lacking without an option for tubes (and the hole has a cover if it's no longer wanted), I've wanted to put tubes in it since I got it, just never got round to it.
I'm going to try and find a shelf to fit inside it too, the one it came with was wire with a wire ladder and I didn't like it for my dwarves (even after I covered it in cardboard), so took it out and lost it in a house move. It's a 13.5" (34.5cm)x19" cage (48.25cm), which are difficult dimensions to find plastic shelves... my friend is a wood craftsman, so I'm tempted to ask him to make me something