just made this with nearly all free materials...the bag is denim free from scrap, the trim also from scrap, the velcro was in my toolbox from god-knows-what and the lining was leftover scrap.
i couldn't find my interfacing to save my life, so it's a little floppy, but the fabric is tough, so it's not too bad. like a doe-head i sewed the flap inside the lining and had to take it out and redo it, but it's all pretty good for a first sincere effort. i have more of all the fabric and trim and i think i'm going to make a full bookbag sized version tomorrow. (this one has a copy of summerland
in it, just so it can look legit.
i wanted to see how much it would flop and pull with weight in it and that was the fattest book i had on hand.)