Check out how strong this girl is! Milla Bizzotto is from South Florida, US. She is only 9 years old and weighs 24kg. But she finished a very hard task — the BattleFrog Race. Within 24 hours, she ran 58km, swam 8km and finished 25 obstacles (障碍). For example, she climbed ropes (爬绳子) and a 3.65 meter-high wall. But why would a little girl want to do this?