Private use of the KidStrong center during your party
Birthday parties that rock.
Kids' Birthday Parties in Sunnyvale, CA
A private, coach-led KidStrong party filled with action, confidence-building games, and unforgettable birthday memories.
KidStrong Sunnyvale
Birthday parties are hosted at KidStrong Sunnyvale, 331 West Washington Ave in Sunnyvale, CA. Call us at +1 669-280-7009 to check party dates and availability.
331 West Washington AveSunnyvale, CAWhy Sunnyvale, CA families love us
HL
H L.
"We’ve had two classes so far with both of my kids, and they absolutely loved it! They’re already asking when they can go back, which says a lot. Abbie is wonderful! She brings such great energy, and both of my kids really opened up to her. She creates such a positive, welcoming environment where kids feel comfortable, ..."
November 10, 2026
AS
ALEXANDRA S.
"Have had the best experience at KidStrong Sunnyvale! It’s been great for my daughter. She was really uncomfortable and shy around new people at the start but KidStrong has made her more confident and adventurous. Highly recommend!"
November 4, 2026
YL
YEN L.
"Kids likes here. They always feel excited for going to the class every week."
November 4, 2026
MH
MELISSA H.
"My daughter started in September and I will tell you that every Wednesday she knows it’s Kidstrong day and is excited to go to class and get strong! 💪"
November 4, 2026
GM
GITA M.
"Both of my boys have really enjoyed their time at KidStrong Sunnyvale ! It’s been a wonderful experience, and we truly appreciate the kindness, encouragement, and positive energy of the coaches and staff. Thank you for making their time here so special !"
November 4, 2026
AS
AARTI S.
"My son has been attending KidStrong Sunnyvale for two months now, and we couldn’t be happier. All the coaches are wonderful, and Coach Abby deserves a special shout-out. She pays real attention to each child’s individual needs and makes every kid feel seen and encouraged. The other coaches are great too, and you can tel..."
November 2, 2026
JP
J P.
"The classes are always so well-designed and full of fun activities, and the coaches are absolutely wonderful! My kids often attend Maggie’s and Roman’s classes, and I’m always impressed by their passion and enthusiasm! I occasionally have chances to take other time classes with other coaches too, and they’re all fan..."
October 21, 2026
LH
LEAH H.
"The KidStrong team runs their classes with genuine child-led instruction. I have seen tangible improvements from the organization and classroom management to my own child’s desire to engage. We love preparing for class by saying, “I am brave, I am strong, I can do this!”"
October 19, 2026
DW
DONTE W.
"Kid Strong is a great place that brings great coaching, teaching and learning. It provides discipline to each kid and makes them very motivated and an honor to be here Kidstrong!"
October 14, 2026
KR
KR
"KidStrong is a great program, and my daughters love it! They were a bit hesitant and shy on the first day, but by the end of the session, they were already asking to come back! Here we are, heading into our 8th session, and the kiddos still look forward to it every time. Our favorite theme so far was learning American Sign ..."
October 13, 2026
JM
JUSTIN M.
"Both my kids have been coming to this gym since the day it opened. Helpful and friendly staff. Great programs. Would highly recommend!"
October 9, 2026
ER
EMMA R.
"Genuine tears in my eyes after class today. I have tried various gym classes but my daughter never had the confidence to say her name or enjoy the class as she was so shy. The first class she wouldn’t go in, just watch all the other kids. Second class she would only take part if nobody was watching. Today was her 7th clas..."
September 27, 2026
KA
KA
"Such a great experience at KidStrong! The coaches are amazing, friendly, and really great with the kids. The classes are fun, structured, and engaging. We’ve had such a positive experience and would definitely recommend KidStrong!"
September 26, 2026
SS
SEAN S.
"KidStrong Sunnyvale has been an amazing experience! The coaches are incredibly encouraging, energetic, and genuinely invested in helping the kids grow both physically and mentally. You can tell they really care about creating a positive and supportive environment where every child feels motivated to challenge themselves."
September 26, 2026
TC
TAYAH C.
"My child and I love KidStrong! The structured games, enthusiastic coaches, and overall great communication when I had questions about the program. I always tell family and friends they should get their kiddos involved with KidStrong. 10/10 would recommend for all families and children"
September 26, 2026
What you get
Everything needed for an epic party.
We handle the movement, games, coaching, setup, and cleanup so families can focus on celebrating.
Book a Birthday Party90-minute private party
Up to 15 kids included
Two KidStrong coaches
One KidStrong T-shirt for birthday child
Food and cake celebration time included
Set-up and clean-up included
90
minute private party
15
kids included
2
KidStrong coaches
Guided fun
70 minutes of guided activities
A KidStrong birthday party is non-stop action, packed with KidStrong-exclusive games and activities guaranteed to create epic memories, with the last 20 minutes dedicated to food and cake.
Book a Birthday PartyPrivate event
The whole facility is yours
Want your kid to be the VIP? We’ve got you covered. With KidStrong Parties, the entire facility is dedicated to your kid’s special day.
Book a Birthday PartyCoach-led
Two amazing coaches
You get not one, but TWO of our KidStrong-certified coaches for the entire duration of your party.
Book a Birthday PartyMake it yours
Party add-ons at KidStrong Sunnyvale.
Add-ons available at KidStrong Sunnyvale. Call+1 669-280-7009 to discuss options that can make the day even easier.
Additional Kids
Additional Party Time
KidStrong T-Shirts for Guests
Goody Bags
Additional Coach Support
Food & Beverage Packages (where available)
Paper Products & Party Supplies (where available)
Ready to celebrate?
Book a KidStrong birthday party today.
Private facility. Expert coaches. Epic memories. Let’s make this birthday strong.
Questions Parents Ask
Frequently Asked Questions
Everything you need to know about KidStrong birthday parties.
How many kids can attend the birthday party?
Each party includes up to 15 kids. Additional kids may be added for an additional fee. Call KidStrong Sunnyvale at +1 669-280-7009 to check availability and pricing.
How old does my kid need to be to book a party?
KidStrong offers birthday parties for kids aged 1-11. Guests 3 years and younger must have an adult (18 or older) on the floor with them.
What time can I arrive?
Check with KidStrong Sunnyvale at +1 669-280-7009 on arrival time.
What am I allowed to bring to the party? What do I need to bring?
Families are welcome to bring food, beverages, cake, decorations, and other celebration items. Contact KidStrong Sunnyvale for any location-specific guidelines.
Is gratuity included or should I tip the coaches?
For details on gratuities or any applicable service fees associated with your party, contact KidStrong Sunnyvale at +1 669-280-7009.
Does the party host’s child count as a part of the total child count?
Yes, any kid that is on the floor counts towards the party count.
Are waivers required for participation?
Any participant on the floor, 18 and under, must have a signed waiver. When you book your party, we will give you a link where you and your guests can sign the waiver ahead of time.
Do parents need to stay at the party?
If the kids are under 3, a parent needs to be on the floor, for kids older than that, please check with the center on parent policy.
How is my party run? What is the schedule of the party?
Our coaches will check in all guests and ensure that a waiver has been completed. Once checked in, kids can join the coach on the blue floor for explore time. When the majority of the guests arrive (typically 5 minutes after party start time), or when the party parent is ready to begin, the coaches will begin the games on the blue floor. Blue floor games and activities will take about 70 minutes and the remaining party time will be for food/cake.
How far in advance should I book my party?
To ensure you get the date and time of your party, we recommend at least 1 month in advance.
What is the deposit amount?
Check with KidStrong Sunnyvale at +1 669-280-7009 for party deposit prices. Deposits are applied to your remaining balance at the end of your party. You can book your party online at any time.
Can I pay my party balance prior to the day of the party?
Yes, you can pay for the party balance ahead of time by contacting KidStrong Sunnyvale at +1 669-280-7009. Keep in mind, a final headcount will take place the day of the party and additional kids will be charged the day of the party.
What is the cancellation policy?
All party deposits are NON-REFUNDABLE. Check with KidStrong Sunnyvale at +1 669-280-7009 for the full cancellation policy.
Do I have to sign a party agreement?
Yes. All parties require a signed party agreement before the reservation can be confirmed.
Where can I get the waivers?
The link to our waiver form is always easily available on our website. You will also receive a link to share with your guests in your part confirmation email. It is recommended that your guests complete the waiver prior to arrival.
Do I have to be a KidStrong member to host a KidStrong party?
No. Non-members are welcome to host parties at KidStrong. Check with KidStrong Sunnyvale on the perks of becoming a member.
Do you offer any add-on packages?
After booking your party, KidStrong Sunnyvale will get in touch with you about the optional add-ons available for parties.
What Add-ons are available for a KidStrong Party?
Call KidStrong Sunnyvale at +1 669-280-7009 for available add-ons and pricing.