So... I had this idea.... and the adventure begins! I wanted to make a simple pouch to hold the mirrors that son makes with his button maker. I wanted a self closure - no buttons, snaps, or Velcro. I used stiffened craft felt so that the tab would stay in the slot for closing.
In the end, son finally convinced me that they just look like cardboard and won't hold up to opening and closing very many times. Oh well... another project to be revisited at another time.