![Cimg7874_2](/uploads/item/file/27/CIMG7874_2.jpg)
3 spine concertina
©Popupology 2009
Generational step structure reversed through a twist in the composition. Cut and folded from A3 card. Part of the "single sheet, no waste series".
©Popupology 2009
Generational step structure reversed through a twist in the composition. Cut and folded from A3 card. Part of the "single sheet, no waste series".