We sectioned off the top and twisted them combining them into twist braids that we added to the ponytail we had already created. It's nice having a big collection of bands, we used a big one for the big ponytail and an elastic to secure the twist braids.
Then I only created the top of the flower bun, leaving the rest of the hair to hang long and then curl with the spiral curling iron. I like doing this occasionally so one can get a sense of how long her hair is. Someday she'll probably want to cut it, but hopefully that day is far, far away. Meanwhile, she loves having long hair!