Here are some pictures of practice sandwiches I did to use as teaching samples with m 4-H group. This is not exactly a tutorial, but I didn't think it really fit anywhere else, and hopefully some will find it useful. Our group of 4-H'rs got together yesterday and they had a blast trying out different designs. I thought you all might be interested in seeing what you can do with a few simple shapes.
For each shape I'm showing a closeup and then a larger view of the whole sample piece.