People play Bubble Football, a recreational sport similar to zorb, in Vratisinec village of Medimurje County, Croatia, on July 13, 2019. (Photo: Xinhua)

People play Bubble Football, a recreational sport similar to zorb, in Vratisinec village of Medimurje County, Croatia, on July 13, 2019. (Photo: Xinhua)

People play Bubble Football, a recreational sport similar to zorb, in Vratisinec village of Medimurje County, Croatia, on July 13, 2019.(Photo: Xinhua)