You find interesting little rocks; ones with some colors and different textures. You want rocks that are about the size of a marble, maybe a little bigger. Then you put them in the tumbler with some grit and water, and turn it on. It's tumbles the rocks, and the grit takes the edges off and starts to smooth it out. After a while, you turn it off and remove the rocks and grit. Then, you put them back in with some more water and a finer grit, and let it run again. You do this a few times, each time using a finer grit. You end up with a totally smooth, polished rock with an almost glass-like surface. It really brings out the colors and details. You can build a little collection of cool rocks with various colors and detail.  

 This is what they look like at the end of the process.
https://image.nostr.build/b27f8fef289ebe577fa811d1d3e65a4255838853786913b55be2bd83d6e46607.jpg 

 nice ones! 👀👀👀 

 I always love the ones with distinct striping from the different layers of minerals.  

 I know what you mean 👍
Theyre all really fascinating  

 Awesome. Thank you, for attuning me into the process. This make sense. Sounds like a real fun hobby for a boy.  

 It definitely is. You become obsessed with finding rough rocks that show a hint of color and texture, and seeing how beautiful they look once they've been polished.  

 Love this. 🌠 

 I think my son would love this! Thanks for sharing this thread and notes everyone