There is a method if I could remember it, to sew them by machine. I think if you sew them end (the hexagons) end to end and have rows of them, then technically you should be able to attach the rows by machine. You would be doing like zig zaging but not stitching but the rows should look like a giant zig zag or giant rick rack. Am I making sense? If I could draw it I could explain better. I am sorry. Hopefully someone else can explain it better :)