How to plan a kids birthday party without losing the weekend
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Plan a kids birthday party four to six weeks out: pick a two-hour slot, invite roughly as many children as the birthday child's age plus one for under-sevens, send invitations three weeks ahead, and plan about 3 drinks and 2 plates per child. That covers most home, park and party-venue birthdays from age 3 to 10.
The rest of this guide is the detail behind those numbers: a week-by-week checklist, how much food to buy, what a party like this tends to cost, and a schedule that keeps a room of seven-year-olds busy until the parents come back.
Week-by-week checklist
Kids parties run on a shorter horizon than adult ones, because parents plan their weekends two or three weeks at a time. Book anything scarce early, but do not send invitations so early that they get forgotten on the fridge.
- Six weeks out: choose the date and a two-hour window, set the budget, and decide home, park or venue.
- Five weeks out: book the venue or entertainer if you are using one; weekend morning slots go first.
- Four weeks out: agree the guest list with the birthday child, and settle on one theme they actually care about.
- Three weeks out: send invitations with an RSVP date ten days before the party, and ask about allergies on the RSVP itself.
- Two weeks out: order the cake, buy decorations and favours, and chase the families who have not answered.
- One week out: confirm the entertainer or venue in writing, plan the activity order, and line up one adult helper per eight children.
- The day before: blow up balloons, set out the craft table, chill drinks, and write a pick-up list with every parent's phone number.
How many kids to invite, and for how long
The old rule of the child's age plus one is still a good starting point for children under seven, who get overwhelmed in a big group. From about seven, whole-class parties become common; if you invite most of a class, invite all of it, or keep the list to a small group you can explain.
Two hours is the right length up to about age 10. Ninety minutes is enough for three- and four-year-olds. Longer than two hours and the last half hour is tired children and a host watching the clock.
Decide early whether parents stay. Under-fives almost always come with an adult, so you are feeding and seating two people per invitation. Say it on the invitation, either "drop-off from 2pm" or "parents welcome", so nobody has to ask.
Food and drink quantities
Children eat less than adults think and drink more. Plan a simple main at the start, cake about two-thirds of the way through, and put the drinks within reach the whole time. If parents stay, add them to the count as adults, with a coffee or a cold drink on arrival.
| Item | Per child | For 20 children |
|---|---|---|
| Main (pizza slices, sandwiches or nuggets) | 2-3 pieces | 40-60 pieces (5-7 large pizzas) |
| Snacks (fruit, veg sticks, chips) | 1 small bowl-worth, about 1 cup | 20 cups across 3-4 snacks |
| Cake or cupcakes | 1 slice or 1 cupcake | 20 servings plus 4 spare |
| Drinks (juice boxes, water) | 3 (2 in the first hour, 1 after) | 60 drinks |
| Plates | 2 (food, then cake) | 40 plates |
| Cups | 2 | 40 cups, more if drinks are poured |
| Napkins | 3-4 | 80 napkins |
| Ice | About 1 lb (0.5 kg) | About 20 lb (10 kg) |
Rough budget
Start from a total, not a wish list. For a children's party, food is cheaper than at an adult party and entertainment is usually the biggest single line. Favours are where small budgets quietly double, so cap them per child before you shop.
| Party type | Guests | Rough total |
|---|---|---|
| At home, simple food and games | 8-12 children | $150-$350 |
| At home or park, with a hired entertainer | 12-20 children | $400-$900 |
| Party venue package (play centre, trampoline park) | 15-20 children | $350-$800 |
| Larger party with venue, entertainer and catering | 25-30 children | $800-$1,800 |
Games and a schedule that works
A kids party needs a shape more than it needs a long list of games. Start with something children can join as they arrive, put the high-energy part in the middle, and finish with food and cake so they leave calm rather than wound up.
- 0:00-0:20: an arrival activity that needs no explaining, like a colouring table, a sticker station or building blocks.
- 0:20-1:00: the main event, whether that is an entertainer, a treasure hunt, or two or three running games such as musical statues and a relay.
- 1:00-1:30: food at the table, so everyone sits down at once.
- 1:30-1:45: candles, singing and cake.
- 1:45-2:00: a quiet game or free play while parents arrive, and favours handed out at the door, not before.
Allergies and safety
Ask about allergies in the RSVP, not in a separate message, and keep the answers next to the food table. Nut-free is a sensible default for any mixed group of children; label anything that is not.
Write a pick-up list with every child's name and their adult's phone number before the party starts. It takes ten minutes and it is the one thing you will be glad of if a parent is late.
Common questions
How many kids should I invite to a birthday party?
For under-sevens, the child's age plus one is a good guide, so six guests for a five-year-old. From about seven, either invite a small group or the whole class, rather than most of it.
How long should a kids birthday party last?
Ninety minutes for ages three and four, and two hours from about age five to ten. Longer than two hours and the final half hour is usually tired children.
When should I send kids birthday invitations?
Three weeks before the party, with an RSVP date about ten days out. Parents plan weekends two to three weeks ahead, so earlier invitations tend to get forgotten.
How much food do I need for a kids birthday party?
Plan two to three pieces of a simple main per child, about a cup of snacks, one serving of cake and three drinks over two hours. Add adults separately if parents are staying.
Do I have to feed the parents at a kids party?
If parents are staying, yes, at least drinks and something to snack on. Count them as adults and say on the invitation whether it is drop-off or parents welcome.