A Messenger Bag for a Reverse Walker

So my oldest boy uses a reverse walker, he had a nasty bag zip tied to it from the school P.T.(physical therapist). It was ugly,could hold all his stuff, so all it did was lighten his back pack but he still had to use one. I decided to make him one. Since I'm not clever enough to actually design a pattern I used See and Sew B4583 and left off the strap. instead I did 3 straps that button, those I did come up with on my own.

inside

I am super happy with it and now he doesn't have to carry a heavy backpack!