‘Not Your Average 9-Year-Old:’ Kidz Toys Partners With Kid Entrepreneur For Slime Event

LEVITTOWN, NY. — Levittown kids will have the chance to merge a classic children’s toy with a 2025 smash hit Sunday, as Kidz Toys hosts a “K-Pop Slime Event,” in partnership with Huntington-based entrepreneurial 9-year-old Sydney Stark and her business, Slimes By Sydney.

The event will be co-branded between the two businesses and the smash hit film, “K-Pop Demon Hunters,” which Netflix crowned its most watched film ever in August. The film follows Rumi, Mira, and Zoey, who collectively form the Korean pop music girl group Huntr/x. When they’re not on stage or in a recording studio they hunt demons, including the villainous boy band of the film, the Saja Boys.

Kids attending the K-Pop Slime Event will have the opportunity to make their own K-Pop themed slime using food coloring dyes, essential oil scents, non-edible sprinkles and glitter. While kids will have the chance to make their own slimes, Kidz Toys also carries a Slimes By Sydney exclusive K-Pop branded slime.

“We actually made a K-Pop slime for Kidz Toys,” Stark’s mom, Melissa, said. “It’s the only place [Sydney] sells the K-Pop slime. We actually didn’t put it on our website yet, because we want it to be exclusive to Kidz Toys.”

For Christina, the manager and owner at Kidz Toys, the event is a meaningful chance to support a young future businesswoman.

“I love to support local kid entrepreneurs,” she said. "I’m really excited to have this little girl come to the store and do this event, you know? As a kid, I was an entrepreneur too, and I always did things like this. And the fact that there is like an outlet where she can come and do something like this, I think is a big deal for kids.”

Once the idea took hold and Kidz Toys started accepting sign-ups, however, demand quickly outpaced availability.

“We did 3 p.m. to 4 p.m., we allowed 24 people to that [time slot], and then we got over 40, [signups],” Christina said. “So we added two more times so we could accommodate the crowd. We have no spots available unless somebody cancels.”

Additional time slots were added at 2:30 p.m. and 4 p.m. In a Thursday conversation, Stark confirmed that those time slots had also sold out.

“She actually has a wait list,” Stark said of her daughter.

The K-Pop Slime Event is the latest chapter in a six-month journey for the Stark family, one that started on a normal afternoon with Sydney doing homework.

“She said, ‘Mommy, I want to start a business.’ And I said, ‘Amazing, what do you want to do?’ And she said, ‘I want to sell slime.’ I said ‘You have to be kidding me,’” Stark said. “We’ve had slime in our house for 10 years. And she said ‘Nope, Mom, I already have all the prototypes, I know exactly what I want them to look like.'”

From there, the development of Slimes By Sydney has been a family affair, as Sydney and her mother sought out designers to develop a logo, launched an Instagram page and, on one rainy Sunday, built a website.

“Every idea is hers, and my husband and I just help her execute it,” Stark said. “We bring in my mom to help with events, so it’s multi-generational. We drop off charms to my grandmother to help make charm bags if we have a big order.”

As is often the case with business success stories, it didn't come without sacrifice.

“What started in her bedroom in April has now transformed, and taken over my entire house,” Stark said. “To the point where I said to my husband, ‘I need you to move the gym out of the basement because we need a workshop.’”

Moving the home gym however, has already paid dividends. After partnerships with local businesses, children’s hospitals and nonprofits, Stark said the slime business is already in the five-figures for sales.

“Sydney and I talk all day everyday about what supplies we need, what we have coming up,” Stark said. “We look at the calendar together, we talk about pricing, she knows what her profit margins are, it’s really unbelievable to watch. She is not your average 9-year-old.”