Recently we created a large worm jar for the kids to study and observe. To an empty animal cracker jar, we added soil, compost and some worms that a teacher student brought in to share with the class. Oatmeal is great worm-food so we put some of that in as well. The kids loved watching the process and seeing the worms. The jar is now in our science area so they can continue to observe them for a few weeks and then the worms and nutrient rich dirt will be added to our vegetable garden!