A $118k Alice in Wonderland and Peter Pan-themed extravaganza, the latest gadgets in the party bags and the Royal Family on the guest list ... welcome to the very lavish world of millionaire kids' birthday parties.
Harper Beckham hit the headlines earlier this week after celebrating her sixth birthday at Buckingham Palace, with a tea party hosted by Sarah Ferguson in ex-husband Prince Andrew's private suite.
But Posh and Becks aren't the only loaded parents forking out thousands of dollars to ensure their little darlings have a memorable day.
Simon Cowell's favourite event planner Alan Duggan, a partner at London-based company, Steven Duggan Events, throws "12 to 15 kids parties a year" for his rich clients, who are based in the UK, Nigeria, Dubai and Russia.
"We've hosted a $118,000 party for one-year-old twins, all the way up to a $420,000 bash for an 18-year-old," the 34-year-old told The Sun.
"Most of our clients are millionaires, although we have organised parties for billionaires.
"The average spend is between $50,000 to $85,000. Parties on the lower end of the scale tend to be around $17,000."
Keen to provide the ultimate experience for their privileged youngsters, Alan said many parents don't even set a budget.
"They just want the best party possible; they want to make the venue looks amazing and for their guests to be wowed. It's extremely fun to have an unlimited spend," he said.
Established in 2010, Steven Duggan Events offers everything from imaginative set design to a 24-hour dedicated team and effortless to-the-moment management.
Sir Elton John, Adele and Simon Cowell have used their services, and they have worked on The Official Monaco Grand Prix after-party and The Katie Piper Foundation Charity Ball.
Alan's favourite children's party was one the team hosted in July 2013 - an Alice In Wonderland and Peter Pan-themed event for a pair of twins celebrating their first birthday. It cost a staggering $118,000.
"The parents wanted storytelling so we hired actors and dressed them as the characters," he said.
"There were large book props, fairground rides such as the tea cups, a mini Ferris wheel and bouncy castles."
He added: "The food was themed - the carrot cake was in the shape of carrots and there was 'Drink Me' tags so the drinks looked like potions.
"It was fun for the kids and the adults. We had a $6,700 pirate bar erected in the garden for the grown-ups, complete with specialist trees and lighting.
"Alice In Wonderland is such a fun theme - kids love it.
"Clients can come up with the wildest themes, but it often goes with what is popular at the time, such as Peppa Pig and Frozen."
It often takes a month to plan the parties, with anywhere between 10 to 90 staff needed on the day.
Steven Duggan Events has thrown a two-year-old girl a $42,000 Peppa Pig party in the garden of her London home, complete with real pigs and actors dressed up as the cartoon characters.
Meanwhile, an eight-year-old girl's Alice In Wonderland party cost $50,000 and featured giant rabbit props, stilt walkers and themed food.
Alan says there's rarely a request his team can't pull off - although sometimes things are out of their control.
"An Arab client wanted Prince William and Kate to come to their tea party," he said.
"We were asked to contact the royal family, they were quite serious about it.
"We has a contact there so we asked if it was possible. Obviously they couldn't, they said they only go to charity gigs. That was the wildest request."
Liz Taylor from Hale, Chesire, is the managing director at Manchester-based events company, Taylor Lynn Corporation.
She agrees that well-heeled clients expect the best.
"My clients are demanding - no doubt about it - but that brings out the very best in me, and is why they choose me in the first place," she told The Sun Online.
"I am equally as demanding when it comes to getting things right. Of course when budgets are high, or parents have carefully saved as much as they can to make the party special, they get fixed on having events organised in a certain way.
"That's why I am employed - to deliver the dream. I take control so they can relax."
Liz plans "two to three children's parties a month" and her clients have included Gary Barlow, Michelle Keegan, Mark Wright and Eamonn Holmes.
"The craziest thing I've been asked to do is hire a circus - and they aren't cheap," she said.
"It was well worth it though. We had everything from the big top, acrobats, clowns, ringmaster, trapeze artists, fire-eaters, candy floss stand …. it was fabulous.
"It was an animal-free circus, so we packed the day with wild and wonderful performers.
"We spent over $84,000 on that, but it was a large party and kept everyone entertained the whole day."
Liz, whose most eye-watering budget was $500,000, says her favourite party was a Back To The Future bash.
"We recreated the film with great decor elements, music, a replica DeLorean car and retro food," she said.
"It really was a Back to the Future moment for the planning team too - we watched the film 12 times!"
Liz, who has previously appeared on the Channel 4 programme, The Millionaire Party Planner, has also hosted children's birthday parties - before they are even born.
"We planned a fabulous baby shower for Cath Tyldesley of Coronation Street and others, sip and see parties for newborns are on the rise again," she said.
"The first birthday is key though. Parents go all out to make this special - more for them than baby I suspect. As for the oldest child - I have produced many Barmitvah, Sweet 16 events, Proms, graduation parties and eighteenth birthdays."
To ensure the children remember the party for months to come, they are sent away with luxury goodie bags.
Alan said: "You could get anything from Disney toys to MP3 players and mobile phones, that's pretty common. They usually cost a couple of £100 per bag."
But, surprisingly, the birthday girl or boy is rarely showered with flashy gifts.
Liz said: "Guests often try to bring something more personal to the child. Many of my client families have the financial resources to buy extravagant items themselves, if they choose to, so guests tend to go in the other direction - and look for a gift that is a token of their affection or more personal to the family."
Alan said many of his clients have asked attendees to make charitable donations instead of bring toys.
There's no denying that these parties are specular, but is it all wasted on a toddler? Alan thinks not.
"I've seen kids react to dressed-up characters and storytelling," he said. "The parents see the kids enjoying it.
"These people have worked hard and they've earned it. A lot of our clients put thousands of pounds into charity."
Liz says they're great for bringing families together. "The very young children don't always understand what the party is about, but any party is a unique and fabulous occasion to bring family and friends together - so still very worthwhile," she said.
"The older children do appreciate our events and are always so thrilled that something so incredible has been planned for them. They have an amazing party that is memorable and the talk of the town - what teenager wouldn't like that?"
This article originally appeared on The Sun.