This is brilliant. Cardboard 3D terrain that folds up for storage has been done before, but I have never seen it done this well and with such clever mechanics. Just take a look at the video on the front page and you will see what I mean.
I have gone for the PDF version simply because shipping to Sweden will double the cost of buying the ready-printed stuff...and because with a PDF I can print a new piece every time I mess up during construction. Edward Scissorhands I am not.
So, go ahead, pledge $18 and join me in a festival of cardboard and glue sticks this coming Christmas!