Cordelia, I noticed you ask how to sew hexagons together........well you don't. You must have a design wall. You arrange everything on the design wall then you actually sew the triangles in rows. You just have to be really careful to keep them in the right order as you take them down to sew. (if you don't have a design wall you can hang a cheap blanket or the back side of a vinyl table cloth on the wall, your pieces will cling nicely without pins) I bought two 4X8 sheets of styrofoam insulation ( 1 inch or more thickness) covered them with batting, hinged them with duct tape and they can stand along or befolded up and stored away. I am about to permanately attach mine to the wall but you don't have to.