Sewing with thimbles? Yes a thimble to the size of my finger. Those who put a background much sewing thimbles . A good habit to get into! (we have enough opportunity to pricking with pins to do not overdo it!) The thimbles is a small honeycombed cap that is put on the finger of the hand holding the needle (right to a right-handed, left for a left-handed). To sew, we take the needle between thumb and forefinger and shoot with finger. When it is wearing his dice, the tip of the needle is located naturally in one of the die cavities. Your thimbles must take on the major, but not too tightly, but without falling. You can choose to make a useful object or a decorative object such as a sewing giant dice. You also do not create the sphere knew it to be a vase or pot shaped thimbles. You can adjust: If you are having any difficulties, need advices or you want me to make changes, I remain at your disposal. If you want to learn OpenSCAD you can follow these video tutorials : http://www.thingiverse.com/thing:656880