When all parts of the worm box get plenty of air, there are no foul odors. Foul odors only occur if air can't get into the pile or if too much food is added in big clumps. Vegetable and fruit trimmings, tea bags, and coffee grounds from your kitchen make good worm food. Meat, dairy products and foods with a lot of fat in them are not good worm food. As the worms move through your bin and eat what they find, they leave behind worm castings, which can be used as compost.
Worm castings are rich in plant nutrients.
You will also need a container for your worms. It can be ordered through local bookstores or mail-ordered from the publisher. Night crawlers and other worm species typically will not survive in your worm bin. Redworms will, because they are adapted to live in and eat decaying plant materials. Under just the right conditions, redworms can double their numbers in just one month.