... TPU and PVC? What's their difference? TPU is a material which confirms to international standard, innoxiously, ... BALLS?We have a zipper!4), HOW DO I BLOW THEM UP?Use an air blower.5), GREAT FOR KIDS THE ... walk or actually, run on the water, that is .....with a little practice.A really great way to ... balance, endurance, and its fun, but if you need a work out walking and controlling the water ball can ...