You can worm bin anything you get from a shop and quarantine them. It is usually the best. I found that compost worms, though small, can do double duty in the home or classroom. We made a bin in class and the kids were able to see the full circle of how life goes. Quite interesting. Compost worms usually can be purchased through a reputable garden center or even from a friend to start your own system. Once healthy and growing 1lb of worms will breed like crazy, compost your food scraps, and make some great compost for the garden.