I have a large worm bin at my house, but I wanted to make a bin that I can keep safely at school, under my desk. This would also work underneath a kitchen sink or another small space.
My worms are mostly eating coffee grounds and shredded paper, but they also get some leftover vegetables from lunch and from home.
I used two smaller bins that fit under my desk.
After drilling holes for aeration, I covered the boxes with paper (to keep the worms in the dark), added food, soil and dampened paper for the worms to dig in, and put the boxes together.