How cool! I've been thinking of using some of my really small scraps to "make" fabric for something, and hadn't thought of sewing them to interfacing - that's a great idea! I'll have to try to steal it at some point! I love your finished product, absolutely beautiful!
Cute bag! And I love that your bf sews! My parents taught me and my 2 brothers to sew when we were young. Neither of my brothers has done anything much with it, but can repair things when they need to be repaired. Unlike my dh, who seems to think that he's allergic to needle and thread! (and really, the one time I saw him try to sew something - a button, I think it was - it came out really horribly!) So WTG, bf's mom! (and WTG bf!)