Author's Note: Tell me what you think! I own nothing.

Whenever Mrs. Hudson took care of Rosie, Rosie was guaranteed two things: cookies, and braided hair. As a girl, Mrs. Hudson braided her own hair, which used to be quite long, as well as her sister's hair. Braiding John's daughter's hair now was like continuing a tradition.

Rosie had the patience of her father; it took a while these days for Mrs. Hudson to bully her old fingers into successfully plaiting the girl's thin blond hair. Rosie sat still and held her tiny shoulders back, emulating John's ramrod posture while Mrs. Hudson made her fingers work their childhood magic. Rosie was always pleased with the results.

Sherlock thought the braiding process was fascinating, judging by the way he would stand behind Mrs. Hudson as she completed a Dutch or French braid, bright eyes intently focused on the intricate weaving.

"Do you want me to teach you how to plait, Sherlock?" Mrs. Hudson said, looking over her shoulder at Sherlock while she finished Rosie's braided pigtails.

Sherlock switched his intense focus from Rosie's hair to Mrs. Hudson's face.

"It seems simple enough. Gather a section of hair at the top of the head and split the section into three pieces. Then, cross the section furthest to the right under the middle section, beginning to add hair to each strand as you weave." Sherlock said confidently.

Mrs. Hudson smiled and nodded, unsurprised that Sherlock had learned the steps so easily.

Rosie said, "I want Sherlock to try!"

"Are you not happy with my work, dear?" Mrs. Hudson asked, smiling warmly to let Rosie know she wasn't offended.

Rosie examined her hair in the mirror, running her hand along the long plait and said, "No, its good. But I want Sherlock to try it. He has fast fingers 'cause he plays the violin."

Sherlock was up for the challenge, as usual. He unbraided Rosie's hair quickly but gently and proceeded to redo the same braid with professional speed.

Sherlock nodded in satisfaction, "As I suspected, it is as easy in practice as it is in theory. This is a French braid, yes? Let's see if my attempt at a Dutch braid brings the same success."

Mrs. Hudson shook her head and went to start her chores. Trust Sherlock to turn the braiding of a little girl's hair into a data-driven experiment."

A/N: I love the idea of Sherlock braiding her hair, its such a cute thing to picture!