Does anyone know of a small object that works as a figit

I have a flatish rock that I painted a mandala pattern on if you use paint pens it works as a great sensory to rub your fingers over since the paint creates a bumpy pattern.

I use Stimaz but their a bit pricey but my ultimate fidget

I use a Rubik's cube or a small stone to fidget with

Marbles or pens or pieces of fabric