An act of kindness from a first-grader to her classmate on the first day of school changed everything for one terrified Texas student. This was in the 1970s, when young Kimberly Patman’s household was the first black family to enroll in the Cedar Hill school district in Dallas. She still remembers the moment a little girl tapped her on the shoulder during recess at Bray Elementary. It was an offer of friendship from fellow first-grader LeeAnn Polster. Fifty years on, the pair are still inseparable. “The first day of school, I was so afraid and cried because everybody was different from me,” Patman recalled to ABC. “Everybody was white and I was Black, so I was just scared. I don’t know why I was scared, but I was scared.” Polster, born and raised in Cedar Hill, was stirred by Patman’s first-day fears and approached her to ask why she was …