Use two 9- to 10-gallon opaque, heavy-duty plastic storage boxes with tops, a power drill with 1/4-inch and 1/16-inch bits, old newspaper, some cardboard, and a pound of worms to make your bin. Drill 20 evenly spaced, 1.4-inch drainage holes in each bin's base. Use the 1/16-inch bits to drill ventilation holes about 1 inch apart around the top of each bin. Drill ventilation holes in one of the tops. Buy the worms online.
Once you have drilled your bins, prepare for the worms by shredding old newspaper into 1-inch strips. Wet the newspaper, but squeeze out excess water to provide an optimal environment.
Cover the bottom of one bin with 3 to 4 inches of fluffed-up newspaper. Add a handful of dirt to the moist newsprint before adding worms. Place the bin on top of blocks for drainage, and put it on top of the upside-down, non-ventilated lid to catch any excess moisture.
Bury food scraps, including bread, cereal, fruit and vegetables, in different areas of the newsprint each day. Avoid dairy, fats, meat and oils, as worms do not like them. Cover the newsprint and compost with a piece of cardboard, then place the second bin, covered, on top of the cardboard. When the bottom bin is full of compost, remove the cardboard. Add moist newsprint, dirt and food scraps to the second bin and place it directly on top of the compost in the bottom bin. Most of the worms are likely to migrate up to the second bin through the drainage holes.
Use the compost in your garden, and switch the positions of the two bins. Transfer any worms left in the compost to the top bin or just leave them in your garden.