Ever find yourself hanging on to some of those cheap wooden chopsticks that they have out for free at, say, a grocery store sushi display? Here's something to do with them, fellow hoarders. A super-simple process yields a really stiff wooden brush that i personally really like using for India ink drawings.
You can get these basically anywhere you would buy sushi in those little plastic containers - grocery stores, cafeterias, etc - and they're totally free!
If you don't have pliers you could probably do this with your teeth
really, be gentle
use your discretion
be aware of how the wood is reacting to you, be nuanced, pay attention to what you're doing
the packaging from triple-a batteries is what i have had success with
you can use the hard back of the stick for solid lines which come out with sort of a drip-shaped taper, like the 3 lines that constitute the little symbol in the bottom right-hand corner. i used black india ink but i bet these brushes are fun with all sorts of materials. have fun, experiment