I use them to blend my watercolor pencils. They can be used over and over again, just clean in between uses
I got these on a whim, looking for something to blend watercolor pencils, but I tried them with chalks instead and was very pleased! It's like using a pencil! The downside is that the tips get soft, but they are still good for big areas. I am trying to figure out how to cut them down! When I am done, I just wash the chalk off and let them dry, and they are ready for the next project!