Waterballs
Water bags and water balls are water sports toys. They are usually round and have a Lycra cover that allows them to bounce on the water. They were invented by Jan Von Heland, and made popular under the brand name Waboba.
Generally, they are thrown across the water at varying speeds and angles to skip them across the water as you would with a skipping rock.
Water balls can be used with a variety of apparatus and equipment, such as launchers, mitts, paddles, net, scoops etc.
Generally they are played with in a body of water (i.e. lake, river, ocean, pool or special pools with goals and water courts of various sizes and configurations). Generally it is easier to stand or squat in shallow water then deep water to keep the arms free. In deep water various flotation equipment can be used to free the hands such as a pool noodle, inner tube, kayak or boat.