Yo-yo maker

In the early 1990's I bought one of those Japanese quilt books with antique quilts in it. This is the one that really caught my eye. Mrs. Mel asked me yesterday how this yo-yo maker works so here I have a series of one handed pictures, one hand holding the camera, one hand holding the maker. First you take a piece of fabric wrong side up, place center disc on it and snap into the bigger piece with that line matching one of 3 bumps on the bottom piece.
Trim around leaving about 1/8" seam allowance.
All trimmed.
Using your thumb to hold the seam allowance down start stitching through the holes in the order that they tell you to do it.
When all of the stitching is done, push the center disc out by pushing through the hole in the big piece.
Carefully peel the fabric off the disc.
Sorry about the blur, remember I'm one handed on the camera here. Pull up the gathering thread.
Voila! a yo-yo with perfectly even pleats that you can arrange going around all in the same direction.
A picture of the package, and again how the finished size compares to a quarter. This one is the "small" size. Now I need to get medium and large if I am going to make a masterpiece like that antique one.