***UPDATE 3/23/20. We have people ordering free replacement bladders who have not purchased an Ollyball. We want kids and parents to play ball in the house, so we continue to replace Ollyball bladders at a loss, but need to discourage purchases from people who have not ordered an Ollyball and charge $2.50 for the bladder, package and postage. There is an inflation instruction video at www.ollyball.com