Wow! Your stitching is fantastically neat!
Thank you! I've had a few people comment on that recently, it never looks quite neat enough to me.
Embroidery's pretty easy to do once things are sewn up. You can worm the needle and thread, and knot, through one of the side seams [A good way to make sure it goes through, and doesn't catch on the fabric is to poke the needle through backwards. But with something that small, it might take a little while to work the needle around inside it to get it poking out the right place. If you stitch back through the previous stitch, you can keep them fairly loose [ie, won't pull the fabric], but stop it from pulling and making the thread loose.
I think I understand what you mean *squinting and sticking her tongue out while she pictures it* I will give your ideas a go. Thanks, everyone.