This is how to raise worm..Find an appropriate home.You don't have to use a refrigerator. If you are looking for a small worm farm, you can do it in an ice cream bucket. Other options include a wooden box, a small hard plastic child's swimming pool, or a plastic tote of the size you want. Create drainage, if necessary. If your container has a tight sealed lid, or will be stored out of the rain, you don't have to worry about drainage. However, if your container is open and outside, you will want to puncture some drainage holes in the bottom sides. If you use small nails and carefully pound them into the sides, down at the bottom, you are less likely to have escape artists. Add the soil. You will want to fill your container about 1/2 to 2/3 of the way up with soil. You will want it to be decent quality soil. It doesn't have to be great soil, but you don't want it to be made primarily of sand or clay. A medium brown, loose soil, with a small amount of sand or clay works well. Add food. This is an important part of raising healthy and reproductive worms. You will want to keep adding lots of food for them to encourage growth and reproduction. Good food sources include vegetable and fruit scraps from the house (carrot peels, lettuce, apple peels and cores), leaves, and grass clippings. You will want to avoid adding potato peels because they will grow (even in the dark), as well as some other items commonly thrown into compost. If you put in eggs and eggshells, manure of any sort or meats of any kind, the soil can get too hot as the bacteria start to decompose these items.Stir it well. Stirring the food is important, as it allows the worms to eat at all levels. This makes overcrowding less of an issue, as the earthworms will live at all levels instead of crowding into the level where the food is at. Top with something dark. Topping the soil with leaves, grass or cardboard is important. This will help hold moisture in, keep it dark under the soil, and still provide food (they even eat the cardboard).

just like rudy said. coffe grounds do work well as do banana peels. be careful with cardboard though because the glue on them will attract cockroaches. pretty sure you're wanting to avoid those. plus 1 for you rudy.

Coffee grounds are beloved by worms. I have a worm bin and you can almost hear the cheer when I toss in the morning’s makings of used coffee grounds. So if you have a vermiculture setup, use old coffee grounds as a food source. If not, simply toss them onto the garden and the worms will find them!!!