The best composting worms are Red Wigglers (AKA red worms) and European Nightcrawlers. The most popular are Red Wigglers because they are smaller, which means, you can house more of them, they eat and reproduce more and live longer.
When we add the plants back in, we're building the health of the soil with the nutrients and organic matter it needs to produce healthy plants and retain moisture. Keeping water on the land is one of the most important things we can do to improve Earth health, and keeping plants on the soil is one of the best ways to do that.
A plastic bin is one of the easiest and most economical worm farm. You probably have the materials to put one together. This is the style of worm farm I have and if this is the type of farm you're going with, there are several things to consider with a plastic bin – the color, type of plastic container and size.