Jungmin Kang holding up pink slime
Jungmin had always enjoyed making things and being creative.
  • Jungmin Kang started making slime out of Elmer's glue and borax as a hobby when she was 13.
  • She set up a business that generated eight figures in revenue in 2022.
  • Kang said being in the same age bracket as her target audience helped with its success.

This as-told-to essay is based on a conversation with Jungmin Kang, a 19-year-old from Round Rock, Texas, about building a business while in high school. Insider has verified her income with documentation. It has been edited for length and clarity.

I started making slime in 2017 when I was a 13-year-old middle schooler after watching a video on Instagram. I quickly got hooked on this weird but satisfying slime. My friends would play with slime, too.