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One humid Tuesday afternoon, Marscha sat on the porch watching her younger brother, Leo, try to fix his bike chain. He was frustrated, covered in grease, and moments away from a tantrum.

Within thirty seconds, the chain snapped back into place with a satisfying clink . Leo stared at the bike, then at his sister. "How did you know that would work?" Watch Marscha

"I watched Dad do it three times last summer," she replied with a small smile. One humid Tuesday afternoon, Marscha sat on the

Later that week, the neighborhood kids were gathered at the edge of the "Old Gully," a steep ravine they used as a shortcut to the park. The recent rains had turned the dirt path into a slick slide of mud. One humid Tuesday afternoon