Gymnastic Birthday Parties – George’s Heights, Mosman.
Host an unforgettable birthday party at Onyx HQ in Georges Heights. Our beautiful boutique gymnastics venue designed for active, fun-filled celebrations.
Located in the stunning Georges Heights precinct in Mosman, Onyx HQ offers a unique party experience where children can flip, jump, tumble and play in a safe and exciting gymnastics environment. With access to beams, bars, air tracks, soft play equipment and more, there’s endless entertainment to keep kids engaged from start to finish.
Our parties are designed to be easy and stress-free for parents while creating a memorable experience for children. Onyx coaches lead structured games, gymnastics activities and fun challenges tailored to the age and energy of the group, helping every child feel included and confident.
The gym has its own private balcony area, bathroom and kitchen space with a fridge, small freezer, microwave, air fryer and other handy essentials for party food, cake storage and catering setup.
We love creating a warm, welcoming atmosphere where kids can celebrate, be active and have fun with their friends. Whether your child loves gymnastics or simply loves to move, Onyx HQ is the perfect space for an energetic and unique birthday party experience in Mosman.
Check out our gallery to see some of the fun we have at Onyx Gymnastics – Gallery!
Soft Play Party (0-3 yrs)
Our Soft Play Parties at Onyx HQ are the perfect way to celebrate for little ones who love to climb, explore and play in a fun and safe environment.
Parties include 1 hour of guided activities, games and soft play fun with our Onyx coaches, followed by 30 minutes for food, drinks and birthday cake celebrations. Alongside coach-led activities, children will also enjoy supervised discovery play time to explore and play at their own pace.
To keep the experience comfortable and safe for everyone, soft play parties are limited to 10 children, with 1 parent permitted per child inside the gym. The birthday child’s parents are welcome to stay for the duration of the party. Parents are responsible for supervising their own children throughout the party.
Please note that all food, drinks and cake must remain on the balcony area and are not permitted inside the gym space. Glitter, face paint and alcohol are also not permitted at Onyx Gymnastics.
Our goal is to create a relaxed, fun and memorable celebration where little ones can move, play and enjoy their special day with friends.
Starting from $400
Gymnastics Party (4-6 yrs & 7+)
Celebrate your child’s special day with 1.5 hours of action-packed gymnastics, games, obstacle courses and fun led by our experienced coaches!
🎉 $450 for up to 15 children
🎉 Drop-off party
🎉 Additional guests welcome (extra cost applies, maximum 20 children)
🎉 Exclusive use of our gym space
Want to make party planning even easier? We offer a range of optional add-ons including cakes, decorations, party bags and themed party packages.
Leave the entertainment to us while your child enjoys a birthday to remember! 🎂🤸♀️🎈
Choose your time slot:
Saturday 2-4pm (0-3yrs 2-3:30pm)
Sunday 11-1pm (0-3yrs 11-1:30pm) OR 2-4pm (0-3yrs 2-3:30pm)
Follow this link to check availability & book your party: Birthday Parties
Prices start
No prior experience necessary. We cater to all abilities and encourage all children to challenge themselves in a fun safe environment!