Ouroboros Spine and i don't know how it gets better than this

Nantahala had been watching squirrels for most of the morning, and had found they were more entertaining than she'd originally anticipated. She liked the way they scurried about, hurrying from one task to the next, and was motivated by their antics. She was also fascinated with the way they climbed, and began to wonder why wolves didn't climb trees. Without an adult around to answer her question, Nantahala figured that she would have to find out for herself. 

She stood at the base of a tree with her arms wrapped around the trunk, and hopped, hoping the movement would give her some momentum to get up the tree.