The kids and I decided while getting ready to plant our garden, that we needed to see the worms move. We were talking about how useful worms are and they desired to see them in action. Here is what you need for your own worm jar.
handful of worms
Layer your jar dirt, sand, dirt, sand until it is about 3 or 4 inches from the top (make sure the dirt and sand is damp, not wet). Add the worms and cover the jar with grass clippings. Place the jar in a cool dark spot. We left ours outside and put our grill cover over it, although a paper bag would work great too. In a week check and see how the worms are moving and the dirt and sand are mixed. Also make sure to keep the jar moist by spraying it every other day or as needed.