What's your side hustle?

I am currently building garden boxes and sell them on the side. I began at the beginning of the pandemic and made about 3k the first year. I thought it was a fluke until I tripled my first year and made about 9.5k over the course of three months. This year I already have back orders and am thinking of hiring my neighbor's teen to learn how to build them this summer.

What about you? what have you made your side hustle?