Start by making two inside-out french braids, one on each side of her head.
Now, there's a hard way and an easy way to add the ribbon. If you want to do it the hard way, try braiding the ribbons into the braid while you're going.
Or, you can do it the easy way. Just take a needle, and thread it through the braid after you're done braiding. Just be careful!
What a pretty little princess!