Frozen Anna vs. Elsa tickle war

Elsa turned onto her side as Anna crept into her room.  
"Elsa!  Psst!" whispered Anna as she clambered onto Elsa's bed.  "Elsa!  Wake up!"  Anna climbed on top of Elsa and shook her.  "Wake up, wake up!"  
"Go back to sleep." said Elsa, with her eyes still closed.
"I just can't." said Anna, flopping on top of Elsa, "The sky's awake, so I'm awake, so we have to play!"
"Go play by yourself."
"No way, Elsa!"  When Elsa still remained in bed with her eyes closed, Anna sat on top of her.  The 18-year-old sighed and looked at her older sister's sleeping form.  Anna poked Elsa in the stomach, and she jolted awake with a giggle.  Confused, Anna poked her sister again, which elicited another giggle.
"Elsa, are you... ticklish?" Anna asked in disbelief, continuing to poke and prod her sister's stomach.
"Noho, Ihi'm not, nohow stohop it, Ahanna!" Elsa gasped through her giggles.
"I can't believe it!  You are ticklish.  The Snow Queen, Queen of Erindale, is ticklish!"  Anna poked one of Elsa's ribs, and Elsa screamed, then started laughing hard.  Anna continued poking and pinching Elsa's ribs until Elsa was breathless.  As Elsa recovered, she formulated a plan.  In one smooth motion, Elsa sat up, grabbed Anna's feet, turned Anna over so she was lying on her stomach, and then sat on her feet.  Anna's soft soles pointed invitingly upwards.  Anna scrunched up her toes, but it was no use.  Elsa started stroking Anna's soft soles, and within seconds Anna was a mess of laughter.  Anna finally escaped Elsa's grasp and called an official tickle war as she began tickling the back of Elsa's knee.  Elsa snorted before bursting out laughing again.  She reached for Anna's sides and squeezed them, and Anna clamped her arms to her sides, but Elsa was too quick and poked her wherever she could not cover herself.  The tickle war very quickly ended with Anna getting hold of Elsa's feet.  Elsa never went outside, and certainly never took off her shoes unless she was in bed.  As a result, her feet were very sensitive.  All Anna had to do was stroke them lightly and Elsa was choking out a surrender.  Anna gleefully declared Elsa a prisoner of war, and continued tickling her feet.
"Nooooooooo faaaaaaaaaaair, Annaaaaaaaaaaaaaa!"  Elsa finally used her icy powers and got Anna off of her.  She lay recovering for a few minutes, as Anna lay on the ground, trapped inside an icy prison.  When Elsa had enough strength to stand, she released Anna, and they went to have breakfast.