Disappearing Nine-Patch - Tote Bag

I signed up (twice) for Aunt Pitty Pat's swap featuring Disappearing Nine-Patch, or Blockheads, as she refers to it. The blocks are so much fun to make, I can't seem to stop! I had a "prize" to make for a contest our "Fun Commitee" sponsored at work, so I made a tote bag using 4 of the blocks. I think it turned out pretty nice :-)

Here are the four blocks I used, after piecing them together with some lattice strips:

And here's the completed tote. I added a fabric flower with a pearl-and-button stamen: