A one-piece printed foldable Tardis net.
Just a bit of fun, I saw some of the folding shapes here on Thingiverse and thought it would be nice to have a model that folded.
It isn't really a derivative, but is certainly inspired by them and in part by the fantastic http://www.thingiverse.com/thing:106595. I can't list them all, but try searching for Tardis, Foldable and Hinge if you'd like to find others.
It would be nice to incorporate into a pop-up greeting/gift card - I need to think about that.
Oh, and it's printed in http://www.faberdashery.co.uk/products-page/print-materials/galaxy-blue/
Update: I noticed that the hinges are a little on the light side due to a bug in the order I created the components, I've adjusted this. Download the "better hinges" version if you'd prefer this updated model.