Earthworms need homes, too. And they don't ask for much in the way of housing. This simple worm propagation bin, ideal for those who raise just a few worms for composting or fishing, is almost too easy to make.
Drain holes must also be drilled in the bottom of the bin. This is in case one gets too enthusiastic about wetting the worm bedding. Worms cannot live in over-wet bins, so drain holes are needed.
My paper bedding includes a lot of paper my mother shredded with her paper shredder (crosscut). It also includes hand-torn newspaper torn into about 1 inch squares.
Well composted manure is also a good worm bedding. I have loads of manure, just not so much well-composted. The composted manure must be moist. In this worm bin, I alternated layers of composted manure and damp shredded/torn paper.
Peat moss is also used in worm bedding. Commercial vermiculturalists often use 50% peat moss and 50% composted manure. Like paper, peat moss must be soaked in water for 24 hours and wrung out for use in a worm bin.
Worms for the worm bin may be obtained from a local worm farm, a bait shop, or purchased in bulk on eBay. Rule of thumb is you want about 1 lb of worms for every square foot of worm bin. Using less, it will take longer for your worms to propagate to desired levels. The type of worm you want is the red worm, or red wiggler, the common type of worm used for fishing, composting, and many other purposes.
To learn more about worm care, I recommend the book Raising Earthworms for Profit by Earl B. Shields. I believe it is the most complete book on the subject.
Profitable Earthworm Farming by Charlie Morgan is also a fine worm manual, and it also includes a short chapter on raising mealworms.