National Geographic Hobby Rock Tumbler Kit

Turn rough rocks into dazzling polished gemstones! This complete hobby rock tumbler makes it fun and easy to transform everyday stones into brilliant keepsakes.

• Durable, long-lasting motor with a leakproof rubber barrel (75% quieter than typical plastic models)
• Includes rough gemstones, 4 polishing grits, and full instructions
• A rewarding STEM activity for kids and adults ages 8+