The Thames & Kosmos Rock Tumbler Refill Pack for use with The Thames & Kosmos Rock Tumbler, Essential STEM Tool for Kids | Includes Rough Rocks, Polishing Grit, Jewelry Settings

Description Refill pack for the Thames & Kosmos Rock Tumbler Essential STEM Tool Includes a collection of rough rocks, polishing grit, and jewelry settings. Kids can continue to build their rock collection with these additional specimens! Refill pack with rough rocks, polishing grit, and jewelry settings for use with the Thames & Kosmos Rock Tumbler Essential STEM Tool.