I’ve built a simple worm bin out of wood and wanted to post the designs. You can find them below as images or here as a pdf. I used wood because so many people have already published good tutorials on plastic worm bins. Furthermore, I didn’t want to use a fossil-fuel-derived product. This is a worm bin I could have built from scraps in my workshop, but because it is sitting in our kitchen, I bought matching wood in deference to the aesthetics and feelings of the others who live here.
Enjoy and please provide feedback and pictures if you end up making this design.