I recently discovered a new hobby that's quite simple and really therapeutic. I learned about the rock tumbling hobby.
What is rock tumbling? Well, rock tumbling is actually a process where you take a rough stone and you rotate it inside a rock tumbler to remove the rough edges.
After this process, you're left with a perfectly smooth stone that you can use as a gift, ornament or make a collection. Here is a picture of a stone which came out of this process.
Beautiful isn't it?