So I made her another pair. A bit different than the last ones but easier to make. It's basically a sock but with worsted weight yarn and size 7 needles. They are 100 % wool so they will be very warm for her little (Okay not so little. She got Dad's feet, as did I) feet. I knit them toe up with a short row heel and they JUST fit so I'll probably be making another pair later this fall when her feet grow more.
Now my littlest brother wants a pair! He's getting the same thing only in grey.