LEGO+Paper = Muji
At last, it seems that the Muji LEGO sets are readily available outside Japan. If you haven't heard of them before, they consist of LEGO bricks and sheets of paper which, when used with the separately available hole punch, can be used to make paper models held together with LEGO bricks.
You can see the selection available and order them from the Muji US website
I actually have three of the sets thanks to a friend who has a relative in Japan, but I haven't done much with them, or added them to the database yet, one reason being they don't have set numbers or any kind of unique identifier except for their barcode. So I guess I'll have to make them up...
However, they do look like fun, that is if you can bring yourself to cut and punch the supplied paper and not keep it MISB!
(thanks to Jeffrey S for the news)