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Complete ultimate Harry Potter themed kids birthday party decorations filling a living room, including wizard printed balloons, black and gold balloon garland, floating candles, hanging swirls, triangle bunting, witch hats, light box, disco ball, library backdrop, happy birthday backdrop, table settings, party bags and character props from a OneStopBox all-in-one party kit.
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Harry Potter party supplies balloon arch kit contents
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Harry Potter party supplies happy birthday bunting
Harry Potter party supplies foil balloons, alternate photo
Harry Potter party supplies character balloons
Harry Potter party supplies balloons, basic kit, alternate photo
Harry Potter party supplies hanging swirl decorations
Harry Potter party supplies floating candle decorations
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Harry Potter party supplies bookshelf wall stickers
Multicolored string lights on a dark background
Party sign with colorful balloons and 'One Stop Box' branding on a blue background. Better than balloons on the letterbox.
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Harry Potter party tableware set of 20 with plates, cups, napkins and cutlery
Harry Potter wizard-themed cake topper
Harry Potter character cupcake toppers for fans
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Large Harry Potter Decorations Box

Transform your space into the ultimate Harry Potter party without the stress, all from one box.

Regular price $399.00
Shipping calculated at checkout.
Hurry, Only 8 Left!
  • Coordinated decorations: balloons, character foil balloons, floating candles, bookshelf wall stickers, hanging swirls, bunting, banner, backdrop, balloon arch, witches inflatable, tablecloth, fairy lights, and a "Party Here" yard sign to help guests find you.
  • Party extras: Harry Potter piñata, Harry Potter cake topper, 20 x party bags, tableware for 20 guests, light-up letter sign, and a colour-changing disco light.
  • Free digital extras with every box: custom invite, themed games, food ideas, playlists and planning guides.

Hand-picked to match, not randomly packed.

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Free Shipping on all boxes

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30-Day Money Back Guarantee

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By Aussie parents, for Aussie parents

Suitable for 10 plus kids badge

Recommend for 20+ Kids


WHAT'S INCLUDED

Decorations

A complete set of coordinated decorations designed to fill the space, look great together, and be set up quickly, even if you’re setting up solo.

  • Balloon Mix (38 balloons)
    A magical mix of Harry Potter balloons with classic magical imagery, perfect for instantly transforming your space into a wizarding world.
  • Harry Potter Bunting (1.8m)
    This character bunting quickly transforms walls, doorways, or tables into a magical party zone.
  • Feature Background Poster (100cm x 150cm)
    This backdrop brings the magic front and centre for photos, cake tables, and key moments.
  • Wipe-Clean Tablecloth (108cm x 180cm)
    Practical and mess-friendly. Covers most standard tables and wipes clean after food, drinks, and cake.
  • Happy Birthday Banner
    Featuring Hogwarts colours, hang this in the entrance or above your feature table for a great finishing touch.
  • Foil Balloons
    Eye-catching Harry Potter foil balloons designed to create a standout feature and bring the wizarding world to life in minutes.
  • Balloon Arch (130 balloons)
    This Hogwarts-style balloon arch delivers big wow fast. Deep burgundy, black, and gold with wizard details to set the scene in minutes.
  • Wall Stickers
    Bookshelf-effect wall stickers that creates the look of a magic library in seconds. Perfect for feature walls, cake tables, or photo spots.
  • Floating Candles (12 pack)
    Hang these LED floating candles and watch the room come alive. Perfect for ceilings, doorways, or over the party table.
  • Hanging Decorations (30cm)
    Six hanging Harry Potter characters to suspend from the ceiling, door frames, or light fittings to add depth and movement to your space.
  • Inflatable Witch's Hat (1.2m x 1.3m)
    Self-inflating with internal LED lights, this witch brings instant atmosphere the moment you turn it on. Perfect for feature corners or party entrances.
  • Colour-Changing Disco Light
    A compact party light with sound activation and remote control, designed to add colour, movement, and a fun party vibe to your space.
  • Lightbox Sign (A4)
    An illuminated lightbox complete with letters and emojis, allowing you to easily customise a birthday message. Ideal for feature tables, gift areas, or photo moments.
  • Multicoloured Fairy Lights (10 metres)
    Adds warmth and atmosphere indoors. Battery powered (requires 3 × AA batteries, not included), so there’s no need to be near a power point.
  • “Party Here” Yard Sign
    An easy to set up outdoor sign to help your guests find the party!
Themed Invites & Games

Invites and games are matched to your chosen theme. They’re free, optional add-ons. If you’d like them, please add them in the next step.

Invites

  • Choose from a themed, generic or numbered design
  • We’ll send you an online survey to collect your party details
  • Your invite is supplied as a JPG and an interactive video so you can share or print

Games

  • Themed activity sheets, including a find-a-word, colouring sheet and spot the difference
  • A bonus pack of 8 extra games
  • Print the A4 sheets at home. You’ll need pencils or textas.

Everything is delivered digitally after you order. 

Music, Food Ideas & Party Planning

Everything you need to plan the party and keep it running smoothly, included FREE with your box. 

Music

  • 4 x kid-friendly Spotify playlists with clean versions only, so there are no surprises
  • Each playlist runs about 3 hours, so one can cover the whole party
  • Access by QR code, sent after you order. Play it on your phone, tablet, TV or speaker.
  • You’ll need a free or paid Spotify account

Food Ideas

  • Cook at home: easy recipes that are nut-free and kid-helper friendly, with serving sizes so you know how much to make
  • Shop and serve: a list of supermarket-friendly ideas for when you’d rather not cook
  • Catering: ideas to consider if you’d like to outsource the food

Party Planning

  • Party runsheet with suggested timings
  • Hints and tips for common party moments
  • What to ask other parents, such as allergies and drop-off or stay
  • Party prep checklist for the day before, the morning of and just before guests arrive

It’s all delivered digitally after you order.

Large Harry Potter Decorations Box

$399.00
Add & choose extras

How it works

1

🎈 Pick Your Theme

Choose from our range of party themes and find the perfect one for their big day.

2

🎁 Choose Your Size

Select based on your guest list or how much wow-factor you want.

3

🎉 Customise Your Box

Add hand-picked extras that work with your theme. There’s less scrolling and fewer decisions.

One Stop Box favicons for kids parties

Don’t Just take our word for it

Quick delivery when I needed something last minute. Really saved the day, thank you.

Karen Boucher
⭐⭐⭐⭐⭐ Google Review

Absolutely head over heels for this company and will 100% be using them for future party purchases

Dawn Iridescent
⭐⭐⭐⭐⭐ Google Review

Absolutely amazing products, amazing service and quick delivery. I highly recommend this company

Mellissa Smyth
⭐⭐⭐⭐⭐ Google Review

First time ordering! Found through fb and it was just what i needed! Quick and easy

Big Blundy
⭐⭐⭐⭐⭐ Google Review

Made everything so much easier! Will be using for next birthday too

Lori Waters
⭐⭐⭐⭐⭐ Google Review

WHAT'S IN THE BOX

🎉
Matching Decorations
Balloons, bunting, banner, tablecloth and fairy lights
⭐
Showpiece Decorations
Statement pieces like balloon arches, inflatables, wall stickers
🪧
"Party Here" Yard Sign
Helps your guests locate and find the party easily
🪅
Piñata
A classic game matched to your theme
🛍️
20 Party Bags
Something memorable for each guest to take home
🍽️
Tableware for 20 Guests
20 sets of plates, cups, napkins, and cutlery
Light-up letter sign
Light-Up Letter Sign
Spell out a name, age or custom party message
Colour-changing disco light
Colour Changing Disco Light
Turns any room into a dance floor and creates the vibes
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After a full day, dinner and bedtime, planning a party is the last thing you have time or energy for. That’s why we put it all in one box. Everything matches and is ready to go.

Paulie | Founder & Chief Party Officer

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EVERYTHING SORTED

The Large box is the full wow factor. Showpiece decorations, a piñata, 20 party bags, tableware for 20 kids, a customisable light-up sign, a disco light and inflatables. Plus everything in the small and medium boxes. Everything arrives in one box, so the whole party is sorted. Some items vary slightly by theme.

GET BACK MORE TIME WITH YOUR FAMILY

Woman sitting at a kitchen table using a smartphone with a laptop and notebook in front of her. I dont have enough time to plan a kids party and I wish planning my kids' party was easier

SPEND LESS TIME PARTY PLANNING

We've done the scrolling for you to make sure you get the best. Close those 37 tabs and just pick your theme.

Stressed parent juggling multiple shopping bags in a car park, solved by OneStopBox all-in-one kids birthday party decorations kit Australia.

SHOP ONCE, PARTY DONE

We've done the shopping for you. Stop chasing tracking numbers, your whole party arrives in one box.

Stressed parent overwhelmed by kids birthday party decoration choices, solved by OneStopBox all-in-one party kit Australia.

THE DECISIONS ARE DONE

No more headaches from staring at lots of similar options. We've made the decisions so you don't have to.

Frequently Asked Questions

How many kids does this party box work for?

The Large box is made for parties of 20 or more kids, in a medium to large room. It’s our biggest box, built for maximum impact and wow factor, so your space becomes the ultimate themed party. Want even more fun? Add extras to help keep the kids entertained when you build your in the next steps. 

Will my box arrive in time for my party?

We recommend ordering at least 3 weeks before your party. This gives plenty of time for delivery, sending invitations and getting food and activities organised.

Party coming up sooner? Give us a call before ordering and we'll let you know what's possible!

What free extras do I get and do I need to print them?

After you add your decorations box, you can add a custom invite and themed games for free in the next step.

Custom invite: we send you a short survey to collect your party details, then design your invite. You get unlimited free revisions until you’re 100% happy.

Themed games: we send you a link to download your games, plus a bonus pack of extra games. They’re digital PDFs you print at home, split into printable sheets and answer sheets.

Playlists and planning: your playlists open from QR codes that link to public Spotify lists, so there’s no setup. The checklists and run sheet are yours to print or use on your device.

Can I customise my box?

Absolutely! Your Large box is already curated and ready to go.  It comes with tableware, party bags and extra statement decorations, it's our ultimate party box, designed so you don’t have to make a hundred decisions. 

Want to add your own finishing touches? Choose from our hand-picked extras in the next step. Everything is designed to work with your theme, so you can make it your own without the extra planning headache.

How long does it take to set up my party?

The planning is already done, so you can jump straight to the fun part! Allow around 3 – 5 hours to bring your Large Party Box to life, depending on your experience, how you choose to decorate and how many helping hands you have. With everything matched and easy-to-follow setup guides included, there's no guesswork. 

Better yet, get the whole family involved and make setting up part of the fun!

What if something arrives damaged or broken?

If anything arrives damaged or missing, we'll replace it for free, no questions asked. Every item has been hand-picked by our founder, Paulie, and he personally stands behind them.

Changed your mind? Return your unopened box within 30 days for a full refund. You’ll just need to cover the return postage.