In case of stress, break ball: Why Koreans are going crazy for one-and-done 'wakppu'

A glossy sphere with a striking resemblance to a Christmas ornament doesn't look like something you're supposed to crush. But that's precisely the point: Once you smash it, bash it and destroy it, there comes catharsis.

The crunchy-squishy ball, known as "wakppu," has become the latest obsession among Korean youngsters and even K-pop stars.

Members of boy bands Enhypen and Cravity, young men in their 20s, have been seen playing with wakppu balls during livestreams and YouTube videos in April and June. Actor Koo Kyo-hwan, a 43-year-old, was invited to play with wakppu ball during an interview.

"Turns out I'm into this," he said while softly pressing his wakppu. Koo's discovery is hardly unique.

On Instagram, more than 5,000 posts are available with the hashtag "wakppu ball" as of Tuesday. YouTube videos of people making and cracking wakppu balls routinely attracted hundreds of thousands of views, with many surpassing the 1 million mark.

From slime and squishies to stress balls and mechanical keyboards prized for their clickity-clacking keycaps, tactile objects have long captivated Koreans. And now, wakppu are the latest craze.

So, what is a 'wakppu' ball?

The name itself, “wakppu,” combines the Koreanized pronunciation of "wax" and the Korean word “ppushigi,” which means "smashing" or "breaking."

Inside its smooth shell is a decorative, slime-like filler. When the crust is cracked, squishy filling bursts out with a tingling, crackly sound — an oddly satisfying multisensorial experience.

The filler for wakppu is a soft clay mixture, which is rolled and shaped into the desired shades and configuration. The balls are then dipped into melted candle wax, which forms a thin outer shell. After about 20 minutes in the refrigerator, the wax hardens into a polished shell that looks just like a Christmas ornament.

Where can you get the balls?

Beyond its simple ingredients, what truly fueled the ball's viral success was its affordability.

The balls are readily available at stationery and gift retailers such as Artbox and Hottracks, as well as Daiso, and are widely sold through online marketplaces. One of the most popular versions — the green apple wakppu sold at Artbox — is reportedly sold for around 3,000 won ($2).

For those who prefer the DIY route, making one is just as affordable. A candle from a dollar store typically costs about 1,000 won and clay dough costs about 2,000 won. Just 3,000 won is enough to customize balls to crush.

Unlike other reusable fidget toys such as squishies and stress balls, however, wakppu are fleeting. Once a ball is cracked, you need to get yourself another one.

More than stress relief

Experts say the appeal goes beyond sensorial and psychological relief. It reminds adult wakppu lovers of childhood memories.

"The popularity of tactile toys among young people is closely tied to an unconscious desire to recapture the sense of security they felt as children, when they could play without worries," Lee Eun-hee, a professor of consumer studies at Inha University, told the Gyeonggi Ilbo.

“As long as reality continuously pressures those in their 20s and 30s, such craving for tactile toys will continue.”

More than amusement, wakppu has become a form of creative self-expression. Instagram Reels serve as a gallery for the craftsmanship behind the trend, where creators put their own stamp on each piece with distinctive colors, shapes and decorative details — from the face of Korea's national football team manager, who led a disastrous campaign at the FIFA World Cup 2026, to Dubai chocolate-inspired wakppu with dark brown shells and vibrant green fillings.

Wakppu food: Enjoying a snack with sound

Wakppu, perhaps inevitably, was swept up in a trend Korea has gained something of a reputation for: It got made into a sweet dessert.

The so-called wakppu salt bread recreates the experience in edible form — a buttery, lightly salted roll coated in a thin, crackable chocolate shell that gives way to cream and fresh fruit inside. It delivers the same cracking sound and satisfaction they sought from the wakppu videos and toys.

Searches for the wakppu salt bread sat near zero in mid-May, then spiked to a peak index of 100 by early June, according to Naver DataLab on Tuesday.

In March, bakery chain Tous Les Jours launched “Agjak cakes,” hard-shelled cakes intricately shaped like fruits such as peaches and mangos, named after a Korean onomatopoeia for the sharp, crisp sound of something brittle cracking or breaking.

Despite the hefty 12,000 won price per tiny piece, the desserts reportedly sold out quickly.

Wakppu takes AI

Tech-savvy Koreans are bringing the wakppu obsession to AI.

With generative AI tools such as Pippit AI, Vivago AI and Google's Veo 3, users produce autonomous sensory meridian response clips of wildly imagined wakppu balls from a text prompt. Some fill their imaginary wakppu balls with malatang (spicy Chinese soup) or tteokbokki (spicy rice cakes).

For them, the crunch no longer has to be real to be satisfying.

BY LEE SOO-JUNG, LEE JI-WON [[email protected]]