I wrote the song for this Theme when I took classes for Permaculture Design Certification. One of the things we learned about was how to build a compost pile, and the value of compost for improving soil nutrition.
Later, I added the Chant and the Fingerplay for my pre-school music students.
Now, I have been composting for several years. I am always amazed at how the compost pile builds up over time, mixing in the leaves and grass and kitchen scraps, and watering it and turning it until one compost bin is full. Then, as I fill the second bin and let the compost age and decompose, there is so very little left. By the time it has decomposed completely and is ready to added to the garden beds, there is one tenth of the original amount.
It is a lesson in how we can save lots of waste from going into the landfill and instead convert so much into a valuable garden nutrient.