I saw a tween girl with this hairstyle at a choir concert not too long ago. I thought she was adorable, and I was intrigued that I had never thought of or seen this before, when it is such a slight change to the ordinary french braid. You just start braiding with hair at the top of the head near the part instead of at the front of the head near the forehead. Braid straight down instead of curving around to the neck. You may run out of hair over the ear before you run out at the back of the head, so you just keep braiding the one side without adding hair to it, but still add hair to the other side until you run out.