This is less expensive than purchasing those worm farms! A clever idea for nature studies. The different colored layers of substrate are there so that you can see the movement of the food and mixing of soil. You can observe how the worm aerates and add nutrients to the soil. Click on "source" link below the image for post, at E is for Explore.
1 comment:
I wish I'd thought of that when Otter was little. It looks like a lot of fun as well as educational.
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