Water walker balls let you run, roll, flip and spin on water without even getting wet. Waterwalkerz are fun for all ages from toddlers to adults. Water Walkers have a single layer of plastic "skin" with a water-tight/air-tight zip along one side. You enter the ball through the air-tight zipper which then gets inflated with fresh air and closed behind you. Once inside and the ball has been filled with air you enter the water and start to enjoy the experience.