For Herbology this week, the Hogwarts Students get to create a Worm Farm in a Jar. Below are some instructions from eHow. More great instructions come from A Mom with a Lesson Plan.
I think finding the worms is half the fun! Look under rocks, or on the sidewalks after it rains. You can check your garden or lawn after the sprinklers have been running. If your Mom or Dad says it is okay, you can dig a small hole with a shovel and find worms. Head outside at night with a flashlight. Worms are more active at night.
1 Drill six or eight small holes in the jar's lid. This will provide your worms with plenty of air. 2
Place a 1-inch layer of garden or potting soil into the bottom of the jar. Add a 1-inch layer of sand. Repeat this alternate layering of soil and sand to almost fill the jar. Leave 1 inch of space between the top of the jar and the upper surface of sand or soil.
Slowly add about ¾ cup of water to the jar.
Provide a food supply for your worms by putting some dead leaves and grass clippings on top of the sand and soil. These critters also like coffee grounds and rolled oats, so add some of either or both if you wish.
Gently place your worms into the top of the jar, and cap it tightly. Place the jar in a location free of direct sunlight. Since worms become active after the sun goes down, put the jar into a brown paper lunch bag and tie some twine or string around the bag just under the jar's lid. They'll think it's nighttime and become active, creating tunnels all through the worm farm. Make sure that you don't cover up the air holes, though.
Watch your worm farm for a week or two. They'll be fine for this amount of time as long as they have food and moisture. Make sure they always have plenty of grass clippings and dead leaves. Add about ¾ cup of water every 3 to 4 days, or when the soil dries out.
Release the worms gently in a shady area of your yard when you're through enjoying your farm. Remove the lid from the jar and lay it on its side on the ground. They will eventually find their way out of the jar and back into their natural habitat.