The real thing is sold on another page.
https://miniaturepopup.com/collections/all-product/products/miniature-book-kit5
A [Flower Children] 10x15x3.6mm
B [Beautiful Flowers] 12x20x6mm
C [Flowers Catalog] 20x25x7mm
D [Les Roses,] 23x32x4mm
Simple process just to fold.
The cardboard has already been cut.
Tools to prepare yourself
1. Cutter
2. Tools to attach a folding line
(Naildot pens, ballpoint pens that have stopped appearing, etc.)
3. Stick glue
4. ruler
5. Mat
6. toothpick
7. Pens, etc. (for aging processing)