In this tutorial, we learn how to build a cheap worm composting box. Start out by using a large plastic box that has a lid, a storage box works great. Also, grab two vents that you will place on the sides. Lay your vents down on the sides of the box and outline how large they are. Now, cut the box and place the vents on the sides with screw to keep it in place. This box is made to keep worms inside, so it doesn't need to look fancy or be decorated on the outside. Once you're finished drilling the holes, you're done and can fill it how you wish.