This is a really simple idea just for fun or if your princess is going to be a Neanderthal for Halloween.
I got this bone from an outdoor skeleton kit that my husband is using as part of his cemetery in our front yard. Make sure the hair is really wet and pull it all back into a tight ponytail.
Take a small section of hair from the top of the ponytail and comb it so that it's really smooth. Place your bone at the ends of the section and then roll it down to the head - just like you would roll a curler. Use a bobby pin on each side of the hair to hold it in place.
Now Barrell Roll the rest of the hair up under the bun and bobby pin it into place as well. A Barrell Roll is basically taking all the hair and (beginning at the ends) roling it up into itself and making the shape of a barrell. (The same motions you did with the bone but there is no bone in the middle.) Make sure your pins form an "X" for a stronger hold.