Building rock tumblers is a project that can help children understand the geological process of the tumbling and smoothing of rocks in water bodies. A homemade rock tumbler is also a creative way of making polished rocks and stones for adornments.
They're hard to destroy, easy to find and even easier to leave behind without worrying about your impact on the environment. After painting rocks, I knew it was time to finally figure out how to carve rocks using a Dr
Extremely Easy Instructions on How to Make a Rock Tumbler at Home