I don't know why I didn't think of this before, but here's a easy way to make a simple puzzle piece. There are a lot of variations to this piece. When you have mastered it, which will take about 1 try, you can add cane, change colors, add different colors. I'm keep this simple just so that you can see how easy it is and jump right in. A beginner can make this puzzle piece. I am assuming that you know how to condition clay and cut it with a blade and cookie cutter. Easy peasy.
What you will need::
Small Amount of polymer clay
blade
small cookie cutter
Begin by conditioning the clay, then on the third thickest setting of your pasta machine, roll out the clay and fold in half. Cut a square or rectangle out of the clay the size you would like the puzzle piece to be.
Using a very small round cookie cutter,
on the edge of your square, cut a partial circle from the clay.
Take the half circle out of the clay, and place it on another side of
the puzzle. It doesn't matter where you put it, that's the design you
create with your puzzle piece.
You can do this again in your design.
Gently roll with an acrylic roller to seal the half circles to the main part of the puzzle piece. Make sure that both pieces are the same width as the puzzle piece.
Poke a hole in your puzzle piece.
Bake according to manufacturer's directions.
Easy peasy.
You. Are. Finished!
Enjoy and experiment.