On my oldest daughter I would say this style is really easy but with my youngest this can be a trick. Not only because her hair is so thin but she is also a moving target while trying to braid.
First make a small poof in the front of her hair.
Then start above her ear on one side and french braid her sides up until you reach the center of her head. Do this on both sides of her head.
Add the hair from the poof and both braids and combine into an elastic as shown below.
I finished this style by making ringlets in her hair and she wanted a bow added.