Kim Kardashian has treated her eldest daughter North to an all-expenses-paid wilderness holiday with a gaggle of friends, but fans spotted one very creepy detail.

WATCH: Creepy detail at North West's ninth birthday party

The mum of four posted a series of photos from ‘Camp North’ to Instagram, showing off her nine-year-old’s luxe accommodation and activities as she celebrated her June 15 birthday.

Snaps showed black and silver balloons arranged by a private jet, which had been decked out with camp-themed goodies, and kids tents set up in a huge room.

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Eagle-eyed fans spotted one bizarre detail on the decorations though; the tents, which were set up inside, appeared to be decorated with fake blood spatters.

“The blood spattered deer tents are something,” one commented, another calling the detail “morbid”.

North cuddles up in her "creepy" blood spattered tent.

Kim addressed the odd choice in an Instagram Story, where she was heard saying of the unique setup: “North’s creepy wilderness birthday, it’s so cool,”

Other photos from Kim showed North and friends cuddled up in the tents on tiny mattresses complete with cosy blankets and matching custom ‘Camp North’ PJs.

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Meanwhile, videos showed the kids enjoying a range of outdoor activities, from wakeboarding, to traversing sky-high bridges nestled among the forest’s treetops.

Among the pint-sized guests was Jessica Simpson’s daughter Maxwell, who appeared in the background of one of Kim’s snaps.

North poses with Jessica Simpson's daughter Maxwell.

Over on her own account, Jess wrote: “CAMP NORTH was magic! Thank you @kimkardashian for giving Maxwell the time of her life and takin’ care of my little lady on her first ‘camp sleep away’ trip! I’m comin’ next time!”

She also shared snaps from the adventure, including one showing North, Maxwell and four other girls posing with huge archery bows.

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Fans flooded the stars’ posts with comments praising Kim for putting on such a magnificent party for her eldest daughter with Kanye West, but some weren’t impressed.

“Life of the rich and spoiled. Yikes!” one penned, while another wrote: “How the privileged ‘camp’.”

Fans criticised the lavish ninth birthday.

They questioned how much money must have gone into the birthday party, speculating that the thousands of dollars Kim likely put towards the extravaganza could have been better spent.

“Why not give her a normal ninth birthday party and put some of that money towards an actually important cause,” one said, suggesting Kim donate to Planned Parenthood or homeless charities in the US.

The Kardashian family are well known for going all-out for birthdays, with parties including everything from live animals to designer decorations.

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