The secret to a large kids birthday party is to stop running it as one big group. Split the kids into small teams, give each team an activity sized for it, and keep a tight two-hour timeline with enough adult helpers. At CipherX, a 10-kid package plus extra kids at $40 each (subject to capacity) covers many mid-sized parties, and for 15 or more kids the team puts together a custom quote.
How Big-Group Birthday Pricing Works
All four CipherX birthday packages are flat-rate rather than per person, and they’re identical at Coquitlam and Delta. Every party runs two hours in total, including time in a private party room for cake, food and gifts. For a long guest list, the two 10-kid packages are your starting point.
| Guest count | Where to start | What’s included |
|---|---|---|
| Up to 10 kids, ages 5–14 | Pack C: Slime Party, $350 flat | 90-minute Slime Chef workshop, 2 custom take-home slimes each, lab coats and safety goggles |
| Up to 10 kids | Pack D: The Crew, $400 flat | One hour of escape room, X-Grid or splatter room, plus one hour in the party room |
| 11–14 kids | A 10-kid package plus extras | $40 per extra child, subject to capacity |
| 15+ kids | Custom quote | Contact CipherX to plan the format |
Example math: The Crew costs $400 for 10 kids. Add four extra kids at $40 each and a 14-kid party comes to $560 before any add-ons. Optional extras such as the Splatter Battle upgrade ($150 flat) sit on top of that, and anything beyond 14 kids moves to a custom quote.
Split the Group: Rotations Beat One Big Crowd
Fifteen kids in one space is noise. Three teams of five, each with a mission, is a party. CipherX activities are built for smaller groups, so plan around their sizes:
- Escape rooms: 2–6 players per room, 60 minutes, with a live Game Master. Each location has four themed rooms, so a big group becomes several teams. Beginner rooms like Pirates in Delta and Wizarding World in Coquitlam suit younger kids; browse all our escape rooms to compare themes.
- X-Grid: 2–10 players on a light-up sensor floor with team game modes and live leaderboards. Ages 5+, under 16 with an adult, and closed-toe shoes are required.
- Splatter room: a 60-minute session where kids paint their own canvas, then switch to a blacklight UV paint battle. Suits and gear are included, there are no age restrictions, and every child takes a canvas home.
- Slime party: a 90-minute Slime Chef workshop for ages 5–14 with a dedicated host, lab coats and safety goggles.
- Free-roam VR: up to 6 players per session, so it isn’t on the 10-kid packages. It can be added as an add-on, with kids rotating through the headsets.
When one activity can’t hold everyone, splitting is the answer. One idea to raise when you enquire: half the group starts on X-Grid while the other half tackles escape rooms, then everyone meets in the party room. For 15+ kids the format is part of your custom quote, so the team can tell you what fits your date and location.
What a split could look like
Say you’re inviting 18 kids aged 8 to 10. One way to start the conversation: ten kids take on X-Grid while the other eight form two escape room teams of four in a beginner or intermediate room. If both run in the same hour, everyone walks into the party room together, buzzing with stories to swap. Treat this as an example only; our team will confirm what’s available on your date.
A good rule for mixed ages is to anchor the party on the activity that suits your youngest guests, then give older kids the more challenging option. For more theme inspiration, read our guide to creative kids party venues.
Recruit Adult Helpers and Give Them Jobs
Dedicated CipherX staff support every party, but a big guest list still needs a few extra grown-ups. X-Grid players under 16 need an adult with them, and a crowd of excited kids moves more smoothly with several adults watching the edges. As a simple guide, plan one helper per activity team.
Give each helper a specific job so nobody stands around wondering what to do:
- Team captain: stays with one group from start to finish and does a head count at every transition.
- Photographer: takes group shots before the activity, while everyone is still tidy, and again after the slime or splatter fun.
- Food lead: gets cake, snacks and drinks ready for the party-room hour.
- Gift and pickup lead: handles the gift table, keeps track of take-homes like slimes or canvases, and makes sure each child leaves with the right parent.
A Timeline That Keeps 15+ Kids on Track
In the weeks before
- 4–6 weeks out: pick the date, location and package. Weekends fill 2–4 weeks ahead, especially 10-kid parties, while weekdays usually open up within a week.
- 3 weeks out: send invitations with a firm RSVP date, and ask families about allergies at the same time.
- 1 week out: confirm your final headcount with CipherX, since extra kids depend on capacity.
On the day
- 15 minutes early: arrive for check-in, the briefing and waivers. With a big group, having waivers sorted before the day saves real time.
- First hour: the activity, with each team heading out together with its captain.
- Second hour: the private party room for cake, food and gifts.
If you’ve chosen the slime party, the 90-minute workshop runs inside its two hours of party room time, so plan cake and food around the session.
A Food Plan for a Crowd
Outside cake and food are welcome, so you control the menu and the budget. With 15 or more kids and one hour in the party room, keep it simple:
- Choose food that’s easy to eat with one hand, pre-cut and ready to serve.
- Label anything containing common allergens, and double-check with parents when they RSVP.
- Bring plates, napkins, a cake knife, candles and a lighter, plus a garbage bag for quick cleanup.
- Plan water or juice for everyone, since active games make kids thirsty.
- Do cake early in the party-room hour so there’s still time for gifts and a group photo.
Frequently Asked Questions
How many kids can come to a CipherX birthday party?
Packages cover 6 or 10 kids. Extra kids are $40 each, subject to capacity, and parties of 15 or more kids get a custom quote.
How much does a birthday party for 14 kids cost?
As example math, The Crew package costs $400 for 10 kids. Four extra kids at $40 each bring the total to $560 (subject to capacity). Add-ons such as the $150 Splatter Battle upgrade are extra.
Can a large group do free-roam VR?
VR runs a maximum of 6 headsets per session, so it isn’t part of the 10-kid packages. It can be added as an add-on, with kids rotating through.
Can we bring our own cake and food?
Yes. Outside cake and food are welcome, and every party includes time in a private party room for cake, food and gifts.
How far ahead should we book a big party?
Weekends fill 2–4 weeks ahead, especially 10-kid parties, while weekdays are usually open within a week. For 15 or more kids, get in touch early so there’s time to build a custom plan.
Ready to plan? Compare packages and book a 10-kid party on our birthday party page, or if you’re inviting 15 or more kids, contact our team for a custom quote at Coquitlam or Delta.