To offer our inflatables at the highest value and lowest entry cost possible. Blast Zone Sells the inflatable (Including Blower) at the lowest entry cost. Then we leave the option to buy Play Balls up to you, rather than bundling them into a higher-priced offering. However, if balls are purchased as an optional add on with your Blast Zone Bounce House or Inflatable Water Park at the time of purchase, the Balls are discounted. Balls are also discounted further as you buy more at once.