Your kids (and the rest of the neighborhood) are going to love this! The Roaring Rapids Water Park ($599) is a jungle of fun, gigantically proportioned, and only takes minutes to inflate — just about 2 minutes, to be precise. Thanks to lasting, commercial-grade components designed with complete safety in mind, you won’t have any reservations about letting children show their wild side. Setup is simple: Locate an open area in the yard, switch on the electric inflation fan, and stake water park into place. Tubing with spray nozzles allows you to keep the kids doused and the waterslides slippery. Water park can also be used without water when the weather’s cooler. A private water park for your backyard!