Bounce houses, water slides, combo units & more - delivered and set up at your door. Serving Round Rock, Pflugerville, Hutto, Georgetown & all of Williamson County.
An inflatable castle is an airtight vinyl or nylon structure kept inflated by a continuous electric blower, designed for children to jump, bounce, and play inside at parties and events. Inflatable castles are the primary product in the party rental industry - delivered to your backyard, set up by a professional crew, and picked up after your event.
In Round Rock, TX and across the Austin metro area, inflatable castles are most commonly called moonwalks - a Texas-native regional term that comes from the weightless, floating sensation children feel while jumping inside the inflatable chamber. Nationally the standard term is bounce house. Internationally the term is bouncy castle. All refer to the same party rental equipment category.
Every inflatable castle type is available for delivery throughout Round Rock and Williamson County.
Classic bounce chamber - the original Texas moonwalk. Pure jumping fun for kids 3–12. Fits standard backyard lots in Forest Creek, Teravista & Avery Ranch.
Multi-section inflatable obstacle course. The go-to for school carnivals near Round Rock ISD campuses, church festivals, and large HOA events.
The right inflatable castle setup for every occasion - birthday parties, holiday weekends, and fall events across Round Rock and Williamson County.
All packages include delivery, setup, safety inspection & teardown. Serving Round Rock 78664 · 78665 · 78681 and all of Williamson County.
Every unit is cleaned, safety inspected, and delivered by our professional team. We handle setup and teardown.
Inflatable bounce castle plus built-in water or dry slide in one unit. Our most-booked rental in Round Rock 78664 and 78665. Fits standard lots in Forest Creek, Teravista, and Walsh Ranch.
Dual-lane shark-themed water slide castle - two riders race to the bottom. A summer staple for Round Rock birthday parties in Teravista, Avery Ranch, and Stone Canyon.
Our biggest slide - the centerpiece for school carnivals near Round Rock ISD campuses, church festivals, and large HOA events near Old Settlers Park.
Sleek 16-foot wave-themed water castle. Fast, smooth ride - the top pick for summer birthday parties near Brushy Creek and Cat Hollow in Round Rock 78664.
Browse inflatable castle types - combo castles, water slide castles, or standard moonwalks. Match the unit to your yard and guest count.
Book 2–3 weeks ahead for summer weekends. Same-week availability sometimes open - call (737) 387-4420 for last-minute bookings.
Lock in your rental with a deposit online or by phone. We confirm same day. Or fill out the quote form and we'll get back to you within hours.
Our team arrives at your Round Rock address, fully inflates the castle, stakes it, inspects it, and gives you the green light before the first child bounces.
Round Rock's party rental season runs nearly year-round. Here's when to book and what to expect each season.
Perfect weather for moonwalk and bounce house rentals before summer heat peaks. Popular for end-of-school parties near Round Rock ISD and backyard birthdays throughout Williamson County.
💡 Book 1–2 weeks ahead for spring break weekends
The busiest rental season in Round Rock. Texas heat drives massive demand for water slide castles. Weekends near Old Settlers Park events and Dell Diamond games fill fast.
🔥 Book 2–3 weeks ahead - our busiest window
Cooler temps make standard moonwalk and bounce castles ideal. Popular for school carnivals near Round Rock ISD campuses and church fall festivals across Williamson County.
💡 Great for large events - comfortable weather for all ages
Lower demand means easier availability. Texas winters are mild enough for outdoor inflatables on dry days. Best time to lock in summer dates before the rush.
💡 Book your summer castle now while inventory is open
We've been delivering moonwalks, bounce houses, and water slides across Round Rock and Williamson County for years. Our fleet is updated regularly, every unit is cleaned after each rental, and our team knows every neighborhood from Forest Creek to Teravista. See our full About Us page.
Concrete facts - not marketing copy - about what you actually get when you book with us.
Every unit is fully cleaned and sanitized after each use - not just wiped down. Your kids bounce on equipment cleaned specifically for your event.
After every single rental - no exceptions
A large enough fleet that your unit is available on your date. Combo castles, water slide castles, giant castles, and standard moonwalks.
15+ inflatable units in our active fleet
We arrive before your party starts. Your guests won't be watching us inflate while they're standing in the backyard. Setup is done before the first guest arrives.
Early arrival standard on every booking
All rentals are provided by Jumpin Joy Party Rentals, who is fully licensed and insured in Williamson County, Texas. Every unit carries a current Texas Amusement Ride Compliance Sticker.
Licensed & insured — Jumpin Joy Party Rentals
From Forest Creek lot sizes to Teravista HOA setups to park permits at Old Settlers Park - we've delivered to every corner of Round Rock and know the terrain.
Hundreds of Round Rock deliveries completed
Call (737) 387-4420 or fill out the form and we respond same day - usually within hours.
Same-day response, 7 days a week
Real feedback from Round Rock, Pflugerville, Hutto, and Georgetown families who trusted us with their parties.
"Set up perfectly in our Teravista backyard. The Kahuna Double was a huge hit - my son and his friends were on it for four hours straight. Crew was on time, professional, and had everything staked and ready before the first guest arrived."
"We rented the Lava Rush castle for our daughter's birthday in Forest Creek and it was the talk of the neighborhood. Kids lined up the entire party. Booking was easy, delivery was early, and the unit looked brand new and spotlessly clean."
"Best moonwalk rental in Round Rock, period. We've used this team three summers in a row for our Avery Ranch neighborhood block party. Always on time, always spotless, always professional. Won't use anyone else."
We've delivered moonwalks and inflatables to every corner of Round Rock. If you're in 78664, 78665, or 78681, we know your street.
All rentals are provided by Jumpin Joy Party Rentals, who is fully licensed and insured in Williamson County, Texas. We deliver moonwalks, bounce houses, and water slides to every neighborhood in Round Rock, TX - zip codes 78664, 78665, and 78681. We set up at backyard birthday parties near Old Settlers Park, block parties in Forest Creek and Teravista, school carnivals near Round Rock ISD campuses, and community events near Dell Diamond and the Round Rock Premium Outlets. Every rental is fulfilled by Jumpin Joy Party Rentals and includes delivery, professional setup, safety inspection, and full teardown - no surprises, no shortcuts. This is Round Rock, and your party deserves a rental team that shows up right.
Moonwalk, bounce house, and water slide deliveries throughout Williamson County and beyond.
Everything Round Rock and Williamson County families ask before booking their party rental.
Fill out the form and we'll get back to you same day - usually within a few hours. Or call (737) 387-4420 directly.
We'll reach out within a few hours to confirm availability and pricing for your Round Rock party rental.