Worm Unit for kids - 10 fun kids activities to explore worms. Includes FREE worm observation book great for science observations for preschool, prek, kindergarten, 1st grade, 2nd grade, and 3rd grade kids (homeschool, science) - GREAT IDEAS!
Making a Worm Jar at Home (and a Free Science Printable)
I'm finally going to have a worm bin that is EASY to use. I am not sure I agree with this website when it says that castings will drop down, though. I think you have to rotate the layers, harvesting the bottom each time.