NATIONAL GEOGRAPHIC Professional Rock Tumbling Kit - Patent-Pending Rock Polisher for Kids & Adults, Platinum Series Ultra Quiet, 2lb Barrel, Rocks, Grit, GemFoam Polisher, A Great STEM Science Kit
- ... PATENTED AGITATE MODE FOR LESS BREAKAGE - The Ultimate Rock Tumbler's patented agitate mode provides even more versatility! Its gentle, back-and-forth motion reduces rock breakage when tumbling softer rocks..
- HIGH-QUALITY EDUCATIONAL TOYS - National Geographic is proud to make the highest quality hands-on science toys, and all our products are backed by exceptional service. If your experience is anything less than extraordinary, let us know so we can make it right for you!.