Sender City | Unique Kids Climbing Experience | Sender One Santa Ana

Welcome to Sender City

We take parties to new heights! Have your next party at Sender City.
Sender City Parties

What is Sender City?

Sender City (formerly known as Funtopia), is an interactive climbing center great for kids and adults of all ages! Climb buildings, towers, shapes or race your friends to the top of the walls. Sender City is located inside Sender One Climbing, one of the biggest and tallest climbing gyms in the country.

Children must weigh at least 35lbs.  All shoes must be close-toed and have non marking soles.


Groups and Parties

We offer various party packages and options to suit every type of event

General Admission

Reservations required to guarantee space.

Sender City Hours

Monday - Sunday: 10am - 6 pm

For Groups and Party Reservations outside of normal hours, email [email protected].

Reservations required to guarantee session


Spider Man

Here’s your chance to be Spiderman! Climb the facade of the building. How about only using the window panes?

Trembling Towers

How high can you climb on the trembling towers? Can you climb the towers with no hands? or your eyes closed?

Drop Slide

The ultimate adrenaline rush — no Sender City visit would be complete without a giant human slide! This is a bonus challenge.

Toddler Park

For small ones under 40lbs! Your little ones are going to love building blocks and learning the ABCs on the traverse wall!

Fun Walls

These are the kids' favorite walls - climb the building ladders, ascend funtopia letters, or try to balance on spinning gears.

Jump Catch

Challenge your fear of heights on the jump catch tower.  Catch the trapeze bar or punch bag.  How far out can you go? This is a bonus challenge.

Box Builder

Stack as many blocks as possible and stand on top.  Lose your balance and you'll have to start all over again!


Climb in the dark!


Is Sender City the same as Funtopia?
Sender City is the new name of Funtopia.  It includes all of the same challenges and experiences as well as a toddler park!
How are climbers in Sender City protected?
Sender City uses the Perfect Descent autobelay device. Perfect Descent automatically retracts a cable attached to climbers during ascent and controls speed during a descent or in the event of a fall.
Do I need a reservation?
Yes. Reservations are required to guarantee your session. You can make a reservation for an open climb session online HERE.
What are the requirements to climb in Sender City?
  • Climbers must weigh between 35 to 300 lbs.
  • No age minimum, but if you are under 18 you must have a parent complete your waiver.
  • Wear comfortable clothing and closed toe shoes.  No climbing shoes.
Terms and Conditions
This is very important information to ensure the best Sender City Party.

  • All climbers and observers must fill out an online waiver. This includes parents and kids who are not participating.
  • You are responsible to pay full price for all reserved spaces.
  • If you do not reserve a space for all participants there is no guarantee there will be available spaces.
  • Parties are not automatically private but can be booked as private.
  • Cancellations more than 48 hours in advance will receive credit, not a refund. Cancellations within 48 hours will not be refunded or credited.
  • Guests should arrive 30 minutes before the scheduled climb time. Late guests will be able to participate during the remaining time at standard cost.
  • The party space will be available for set up when the climbers begin climbing and not before. No decorating the party room.
  • The party space must be vacated by the end of your booked time.
  • The final bill will be settled at the end of the party. Please don’t leave without checking in at the Sender City desk.
  • Wear comfortable clothing. Pants are recommended.
  • Closed toe shoes are mandatory. NO climbing shoes, high heels or open toe. No jewelry. Have long hair tied back.
  • Balloons are not permitted in the facility.
  • Alcohol is not permitted in the facility and will be removed.


What I LOVE about our experience at Funtopia, was that my children were able to try something new and conquer some of their fears of heights. You would never guess that they were afraid to climb up the walls when they first arrived. By the end of their session, they were climbing all the way to the top of the obstacles.  I was not only amazed, but proud of my boys for accomplishing this feat.
Jill Parkin

Blogger, Sandy Toes and Popsicles

I just wanted to go again and again.  We explored the entire area which included cool pillars to climb, various climbing walls, even a structure with a high platform on top in which you can jump off to a trapeze swing or a swinging punching bag thing.  It was one of those experiences I will always remember and Emma loved every minute. It was really cool to get to do something like this with her.

Blogger, Tiny Oranges


Sender One Climbing


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Ron T.
"The kids stuff is really well run. They maintain a high staff to kids ratio. The kids are well watched. Sender City is awesome." (Read More)

Jennifer S.
"We came here on vacation, and I'm sorry we don't live close enough to buy an annual membership. Both the equipment and the personnel were exceptional." (Read More)

Casey M.
"Our family really loves (Sender City) at Sender One. The walls are all decorated in a really fun way for the family. They have a good assortment so that everyone will find something they like." (Read More)


All climbers and observers must fill out an online waiver. This includes parents, grandparents, babies and kids who are only watching. Fill out a waiver online to save time at check-in.


Sender One SNA
1441 S. Village Way
Santa Ana, CA 92705



Climbing Center and Yoga & Fitness Center
M-F: 6am - 11pm
Sat: 8am - 8pm
Sun: 8am - 8pm

Sender City - Reservations Required
M-F: 10:30am - 6:30pm
Sat-Sun: 9:30am - 6:30pm

(last session begins at 5:30pm)


Sender One & Sender City SNA
(714) 881-3456
[email protected]

Groups & Parties
[email protected]

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