NSI Rock Tumbler Refill Classic - Works with NSI 635 -

The NSI Rock Tumbler Refill Classic kit includes 8 oz of precious stones. Kids can learn about minerals with this educational and fascinating product. Use this product along with your existing rock tumbler toy to watch these stones become shiny and beautiful. This product is useful for learning the principles of geology, gemology and more. It's a fun activity for days and nights indoors. Once they're polished, you can use the rocks to make jewelry or keychains, or just enjoy their natural beauty. Perfect for Children 10 Years and up

NSI Rock Tumbler Refill Classic: Kid's rock kit includes amethyst, jasper, agates and others Works with the NSI rock tumbler (not included) Recommended for ages 10 years and up Kids' craft kit is educational and fun Includes 8 oz of stones Polished rocks are fun for making pendants and other projects