I found this rather bulky and awkward to assemble. I did do the math and figured out that for five sides to make a circle, I needed 72° degree angles between each section, This went okay until the last one. I didn't take into account the thickness of the sandwiched pieces.
My whole idea of paper crafting is that it shouldn't be difficult. I had made their 3D cactus which uses only four sections to make the base. I decided to modify the pumpkin pieces to assemble them more in this mode. Enjoy the video and send feedback if you've tried to make these as well.