Walmart offers the Banzai Aqua Drench 3-in-1 Inflatable Splash Park, model no. 5503, for $28.36. Opt for in-store pickup to dodge the $4.97 shipping fee. That's the lowest price we could find by $16. It features a 15-foot curved water slide, 78" x 50" inflatable pool with slide, and water-drenching spray sprinkler.