National geographic rock tumbler, Used and Reviewed!
Here is an educational kit that teaches your kids a thing or two about rocks. The National Geographic Rock Tumbler can turn rocks into polished gemstones. It comes with time and speed control settings.
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This rock tumbler has a heavy duty motor and stainless steel lid. The tumbler barrel is leakproof. This kit comes with 4 levels of grit and 3lb of stones.
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