The National Geographic Hobby Rock Tumbler science set is a complete rock polishing kit that allows your kid to turn rough rocks into gemstones. Tumbler kit by National Geographic includes one pound of rough gemstones, eight packets of polishing grit, a storage pouch, and five jewelry fastenings. The tumbler base and motor are built to last, and the tumbler barrel is designed to be low noise and leak proof. It has a built-in timer and automatic shut off switch too. Now your kids can create beautiful keepsakes from your favorite specimens. CREATE YOUR OWN GEMSTONES - Rock tumbling is a hugely popular hobby for kids and adults! This starter rock tumbler makes it fun and easy to turn rough rocks into beautifully polished gemstones, thanks to its simple operation and durable design A TUMBLER THAT'S MADE TO LAST - The durable motor allows you to tumble multiple batches of rocks. An improved, leak-proof barrel is lined with rubber for quieter operation while tumbling on the sturdy tumbler base EASY TO USE AND EDUCATIONAL - Detailed tumbler instructions lead you step-by-step through the rock tumbling process. A full-color learning guide details how rocks are naturally polished and has fascinating facts about the gemstones in the kit National Geographic STEM series provides kids high-quality educational toys that are a whole lot of fun Our easy-to-follow instructions lead you step-by-step through each activity. There are also safety glasses, gloves, and an easy-clean experiment tray included
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