I made this little purse out of necessity: I needed something to keep my heart rate monitor stuff in, because it was constantly floating around in my backpack and I kept losing the little monitor and my watch in the abyssal depth that is my backpack. So I grabbed some green and grey cotton yarn I had lying around, chained 20 stitches, following this pattern very loosely, and switched up single and half-double crochet to keep things interesting.
I added a small flap and a button I found lying around my desk (I'm guessing it came off my old winter coat, but I'm not even sure! And that, ladies and gentlemen, is a glimpse into the black hole that is my desk.) to ensure that it wouldn't be too bulky but would still close.
And that's it! Took me 2 hours, tops, spread out over 2 lunch breaks. Now I can carry my heart rate monitor and all its accessories and my little lock for the lockers in one handy little bag! (all I need to remember now is to take it all out of the bag and put the empty bag in my backpack before I stick that in my locker. I always end up with all my kit on and my gear all set to go and then have to go back into my locker to put this bag away...)