Here is an example summary of this reading selection:
Mary Roach, a tom boy, was proud of her toughness and felt superior to the girlie girls in the neighborhood. But secretly, she harbored a crush on one of the neighborhood boys. To impress her secret love, Roach took risks, even casting her beloved bike into a muddy pond, all in a vain hope to impress the boy, who, rather than being impressed, preferred a pretty, girlie girl from the neighborhood. This realization marked a key moment in her growth between childhood and adolescence. Still, her bicycle symbolizes for Roach the key traits of childhood self that she still finds valuable: independence, faith in one’s physical strength, and freedom from gender labels.

Your summary will differ from this one in the way it is written, but it should include roughly the same information.