I also haven't tucked in the ends.
Since I am using a new technique, I wasn't sure that I'd include an image of my first attempt, but after seeing how cute it's turning out, I couldn't resist!
The whole thing is done with a rib stitch around the wrist and a moss stitch along the rest. The stockinette stitch on the thumb is the same grey that the interior of all of the mittens will be. It almost completely disappears through the rest of mitten.
As I finish them, I will plan to show some scale with my very first set of mittens. I made them for myself in high school. For anyone else with ridiculously tiny hands, I tend to make prototypes in my size so I can figure out exactly what I'm doing.
I'll also be sure to include some images of what these mittens look like as I'm doing them. Since the layers are completely integrated, I had eight needles in this tiny thing at once.