I've shown you the free-piecing basics - that's all you need to know to sew a face yourself. I've drawn it out for you here so that you can see all the seams, although I forgot to give this Frankie some hair. Depending on whose face you're piecing, you might want to skip the scar across the forehead and the neckbolts... heh heh heh.
Figure out how I pieced this together. The shortest seams were sewn first, the longest were last.
I thought of a way to kill two birds with one stone. I'm going to show you the way I put this together AND show you a way to play with improvisation without using up any fabric.
First I gathered some construction paper, paper-cutting rotary cutter (I have two rotary cutters, this one has an old blade in it that doesn't work well enough on fabric anymore), scissors, ruler, and tape.
I started Frankie with the eyes. I cut two rectangles for eyes and sewed them into some face fabric. I'm going to describe how I SEWED Frankie, even though the example is paper. Is that okay? When playing with paper, I obviously used tape instead of stitches.
Now if I were doing a more refined face, I probably would have put long triangles on the corners of the eyes in order to get an almost shape. (Or triangles onto squares to get circles.)
The next step was to cut out a nose shape. I inserted it into a wide strip of face fabric, leaving plenty of extra strip on either side of the nose:
and lopped off the extra tails. Okay need a bit of face material for under the nose, so sew it on and trim off the excess. And better insert a mouth into a strip of face material. I deliberately used a leftover bit of face paper on the left side of the mouth - gives this guy a quirky look.
Here's paper Frankie:
You can work out all sorts of ideas using paper. Give it a try.