As Toby walked home one day, the class bully, Simon, came up behind him and pushed him over. Toby struggled to his feet.
"What was that for?" Toby spluttered.
Simon laughed. "Haha. You have a... um.... yo-yo! Sissy!"
Simon walked off, laughing impishly. Toby was confused. There was no yo-yo in his backpack... Was there? He took it off to look through and, lo and behold, in the mesh pocket, a purple-gold yo-yo resided. Stripes of gold ran the length of the purple body, giving it a perpetual-motion look. Toby took the yo-yo out of the pocket. He pried the string up out of the inside of the yo-yo, put the loop on his finger, and threw it down. It flew down the string like a swan diving, and hung at the end, suspended, until Toby jerked his finger up and the yo-yo willingly traveled up into Toby's hand.
Toby smiled, and walked the dog home as if he had been doing it his whole life.
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The next morning, Toby grabbed his backpack and his yo-yo (he had affectionately named it Stripe,) and raced out the door. Toby couldn't wait for show-and tell that day.
As he walked to school, Simon came up behind him.
"Haha," he guffawed. "Sissy. Still have that dumb yo-yo. Ha."
Toby was mad. He was about to walk quickly away and hope Simon would leave him alone, when Stripe reared up of its own accord. It swayed back and forth on the string like a cobra preparing to strike. Simon watched the yo-yo, mesmerized, as it got closer and closer. Suddenly, it lunged forward and knocked Simon on the forehead. The bully's eyes rolled back, and he fell to the ground, knocked out.
Toby was astonished. "Stripe, did you do that because I was mad?" he asked the yo-yo.
The yo-yo seemed to nod.
Toby smiled. "Stripe, this will be a long and beautiful relationship."
This is based off the story mentioned in "Professor Winsnicker's Book of Proper Etiquette for Well-Mannered Sycophants" by the name of "Toby Finds Something in the Mesh Pocket of His Backpack."