PG |  1h 26 m | Family, Drama, High School | February 21, 2023 “Heart of a Champion,” much like “National Velvet,” is a totally-made-for-kids, sweet little drama for young tween girls who like horses. Which covers quite a wide spectrum of young girls. In the lead is a 14-year-old girl named Charlie (YaYa Gosselin) who’s got a…