Smiling Mary Hubbell, a 14-year-old sophomore at San Gabriel High School in Alhambra, Calif., clutches her well-deserved trophy after winning the Class M (midget) hydroplane championship in the National Outboard Association meet at Mt. Carmel, Ill. A conscientious student who hopes to major in child psychology at Stanford, Mary flew east to the meet on a Friday. On Monday, trophy in hand, she flew home, and when the bell rang Tuesday morning she was back at her classroom desk. Mary took up hydroplaning at the age of nine. Her father, Randolph Hubbell, now a manufacturer and designer of racing engines, was an outboarder. But Mary's enthusiasm for motorboating caused her mother no little alarm. Mrs. Hubbell insisted her daughter learn to swim. With the zest of a born champion, Mary did learn—in two weeks. And it wasn't long before Mary was a medal-winning swimmer in local meets.