And here is how we created the books. Look under the DIY tab to find instruction sheet that you can download.
Using 4x8" drawing paper (grain short) we folded each paper in half and added a pop-up cut along the fold and illustrated the pages. Each child made 4 pages. We then folded two sheets of 4x16" copy paper into 4-fold accordions. Each pop-up page was glued into a valley of the accordion with glue-stick (being careful not to get glue on the pop-up in the center). The 2 accordion were glued together.
I had prepared covers with a 1/4" double-fold spine, and strips of double-stick tape alongside the spine and each edge. These were decorated with a title and images. The cover was wrapped around the double-accordion pages and edges squared. Center tapes were removed first, then tapes at the edges. Hope these photos will help. It's hard to describe with words.
Here below, you can see two pages tucked into a four-fold accordion.
And here is the other 4-fold accordion. Glue was applied
along the edges of each page, but not in the middle.
Here is the cover, prepared with spine folds and double-stick tape.
Four folds are scored into the center to create a spine, similar to the spine of a board book.