Last night at guild I "taught" a class on how to make a biscornu or tuffet. Mostly, I handed out the directions, and explained the seam. I worked on this:
It's not quite a tuffet; it has 15 sides. I still need to add a button in the middle, and since I trimmed the corners so closely, I have to add something to cover the mess that resulted; I think a bead on each corner would look nice.