{"product_id":"national-geographic-hobby-rock-tumbler-kit-geology-ages-13-plus","title":"National Geographic Hobby Rock Tumbler Kit - Geology Science Kit, Ages 13+ (9-12 with Adult Help)","description":"\u003cp\u003eA complete rock-tumbling lab for an extended earth science project. Students turn rough rocks into polished gemstones over several weeks, learning how erosion and abrasion shape stones in nature while practicing patience and careful record-keeping.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLearning goals:\u003c\/strong\u003e geology and mineral identification, erosion and abrasion, the Mohs hardness scale, and a multi-stage scientific process.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSkills practiced:\u003c\/strong\u003e following a multi-week procedure, timing each grit stage, observing and photographing changes, and comparing results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat's included:\u003c\/strong\u003e rock tumbler with leak-proof rubber barrel and one-touch timer with automatic shutoff, nine types of real rough gemstones, four stages of polishing grit, sifter, jewelry fastenings, and a detailed full-color learning guide.\u003c\/li\u003e\n\u003cli\u003ePlugs into a standard outlet. A full tumbling cycle takes several weeks.\u003c\/li\u003e\n\u003cli\u003eRecommended for ages 13+, or ages 9–12 with adult help (manufacturer age 8+).\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eA practical hands-on option for Arkansas EFA families planning homeschool lessons. EFA funding eligibility is subject to program rules and approval; approval is not guaranteed.\u003c\/p\u003e\u003cp\u003eAdult supervision recommended. Do not pour used grit down drains.\u003c\/p\u003e\n","brand":"National Geographic","offers":[{"title":"Default Title","offer_id":50857533505698,"sku":"ESS-KIT-B01LQCIL88","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/0846\/9666\/files\/91yg3JBdlgL.jpg?v=1794458251","url":"https:\/\/essentialschoolsupply.com\/products\/national-geographic-hobby-rock-tumbler-kit-geology-ages-13-plus","provider":"Essential School Supplies","version":"1.0","type":"link"}