Last month, I spent some time working on a messenger bag tutorial and submitted it to the Sew Mama Sew Back-to-School feature. And it was posted over there today! I hope it inspires some other crafters to make some. I have plans to make a second one for my oldest daughter in some laminate fabric.
I also modified the dimensions to make a matching lunch bag. I lined it with some PUL so it's also waterproof.
This messenger bag has barely left my little girls side and it even came camping with us last week. I love it when my girls use (and sometimes abuse) things I've made for them, it keeps me wanting to make more!