![Cimg7754_2](/uploads/item/file/19/CIMG7754_2.jpg)
3 spine concertina detail
©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".