A 15 minute project that solves 2 problems very nicely.  The first problem was that since my phone is black and my bag is also black I can never find my phone in time.  The second project was some old canvases taking up rather too much space.  So I removed the canvas from the stretcher and 15 minutes later had a new phone case...  The most difficult part of this was just turning the canvas inside out.  The end of a brush helped enormously to poke the corners out.