Fun Factory Team · Updated 2026-09-01
When a combined party makes sense
Siblings with birthdays a few weeks apart often share friend groups, cousins, and grandparents. Booking one party instead of two saves money, one round of setup, and your sanity. Indoor play centres work especially well because kids entertain themselves on the play floor while adults chat in the party room.
Combined parties also make sense when both children are young. A three-year-old and five-year-old might want different themes but the same guest list. Pick a neutral theme like colours, animals, or favourite characters and let each child choose one element of the cake or decor.
The key is guest count. Add both children's class lists and family obligations together, then pick a package that fits with room to spare.
Choosing the right package for two kids
For smaller joint parties, the Active Fun Party at $499 covers 15 children and 15 adults. That often fits two preschool classes if you limit plus-ones.
The Supreme Fun Party at $599 bumps you to 20 children and 20 adults with two party-size pizzas. This is the most common upgrade for school-age siblings who each want five or six friends.
Big families and team rosters land on the Extreme Fun Party at $699 for 30 and 30, or the Ultimate Fun Party at $999 on weekdays and $1,499 on weekends if you want the entire centre privately.
Additional children are $14.99 each and additional adults are $4.99. Build your list on paper before booking so you are not surprised at the desk.
Invites, themes, and timeline
Send one e-vite that names both birthday kids. Fun Factory packages include e-vites, or you can design your own and share the waiver link in the same message.
During the 2.5-hour party, your host runs pizza and cake timing. Many families do one shared cake with both names, or cupcakes split by flavour. Our standard birthday cake can be substituted for a large pizza if your kids prefer savoury.
Sing one happy birthday or two quick ones back to back. Keep speeches short. Kids want play time. Most of the magic happens on the structures before food anyway.
Fairness tips parents appreciate
Let each sibling pick one party element. One chooses balloon colours, the other picks the playlist. Shared control reduces rivalry on the day.
Split gift opening at home if you worry about comparisons in front of friends. At the party, focus on games and play.
Book weekday if your combined guest list is flexible. Monday through Thursday parties save $50, which you can put toward extra guests or a joint gift they pick together.
Take a group photo on the play floor before pizza when everyone still has clean party outfits. After cake, faces get messy and energy shifts toward home time.
Split ages without splitting the party
A seven-year-old and four-year-old can share one party when the play centre has both toddler zones and big-kid structures. Younger siblings stay near the soft play while older kids climb with friends.
Assign one adult relative to each birthday child during gift time at home later. At the venue, keep activities shared: group photos, one cake moment, and open play for everyone.
If age gaps are large, invite fewer classmates and more family so the room does not feel split between babies and tweens. Package size should match total bodies in the room, not just one child's friend count.
Send one thank-you message after the party naming both kids. Parents appreciate clarity on who was celebrated and which family handled the invite list.
Consider a shared theme colour instead of two competing characters. Red and blue for both kids beats arguing over Paw Patrol versus Bluey on the same cake table.
Budget snapshot for combined parties
Two separate home parties might run $300 each for food and decor alone. One Active Fun Party at $499 feeds and hosts fifteen kids with play included.
Supreme at $599 fits twenty guests when both siblings invite full classes. Add weekday $50 off and the gap versus two smaller events shrinks further.
FAQ
Can we book two separate cakes?
Our packages include one standard birthday cake. Many families bring a second nut-free dessert or cupcakes if they want separate designs for each child.
What if our combined guest list exceeds the package?
You can add children at $14.99 each and adults at $4.99 each, or move up to the next package tier for better value.