POLISH ROCKS AT HOME - Discover the fun hobby of rock tumbling and transform rough rocks into beautiful gems;COMPLETE ROCK TUMBLING KIT - Includes tumbling stones (9 types), polishing grit (4 types), jewelry fastenings, and instructions;QUALITY TUMBLING MACHINE - Featuring a high-powered motor, this is a workhorse machine that will last for years;START A ROCK COLLECTION - Spark a child's love of geology and learning with this hands-on earth science kit;100% SATISFACTION GUARANTEE - Join the millions of parents who have chosen our award-winning science toys and experience the Discover with Dr. Cool difference!

• Discover with Dr. Cool Rock Tumbler Set - Turn Rocks Into Stunning Gemstones

Discover with Dr. Cool Rock Tumbler Set - Turn Rocks Into Stunning GemstonesDiscover with Dr. Cool