National Geographic Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults
by Blue Marble
- EVERYTHING YOU NEED - Tumbling machine, 9 types of rough gemstones (226 g), four polishing grits, jewelry fastenings, educational guide, & instructions, A TUMBLER THAT'S MADE TO LAST - Our high-quality tumblers are made with a durable motor designed to last for years. The leakproof rubber barrel reduces sound, making it 75% quieter than other plastic models. An excellent STEM activity for kids., A COMPLETE HOBBY TUMBLING KIT - Everything you need to create polished gemstones: the tumbler, 4 polishing grits, sifter, 9 types of real rough gemstones, plus a full-color Learning Guide. Makes a great gift for girls and boys!, EASY TO USE - Simple instructions and one-touch settings make rock tumbling fun and easy. Control the number of days for each tumbling cycle with the one-touch timer and automatic shutoff feature. Just set it and forget it!, AWARD-WINNING PRODUCTS - Blue Marble, winner of the Toy Association's prestigious Toy of the Year Award, proudly develops products that foster education, imagination, and creativity, with a U.S. support team to ensure a stellar experience!
