My mom used to do this to my hair when I was little. I have alway put off doing it for that reason. I was in disneyland and say a cute little girl with a similar hairstyle so I figured at that point why not share it.
This style is so easy to do especially if it is wet.
Start on one side and start rolling adding hair from the outside similar to adding hair with braids but from only one side. The style is as simple as that. Do it to both sides and secure in the center with an elastic.