... excellently in material functions, but cheaper.2), generally, how long can people stay in the water ball?a). ... THOSE BALLS?We have a zipper!4), HOW DO I BLOW THEM UP?Use an air blower.5), GREAT FOR KIDS ... time!6), NIGHTIME WATER FUN INSIDE THE "LOVEBALL"We use a long safety rope, at night, thus allowing for ... floating around on top of the water and even use a flashlight at night to attract them to swim ...