Water Ball
A water ball or water walking ball is a large inflatable sphere that allows a person inside it to walk across the surface of a body of water. The giant ball is usually two metres in diameter and has a zippered entrance to allow for easy entry and exit. The water ball[1] is similar to the zorb, but it has only one layer and is designed for water travel rather than down-hill rolling.These water balls have been used at swimming pools, marinas and lakes in an effort to keep children fit .
However pregnant lady , people with heart problem & who had recent surgeries are advised to stay away from water zorbing.