Science & STEM Kits

NATIONAL GEOGRAPHIC Professional Rock Tumbler Kit - Complete Rock Tumbler for Adults & Kids with Durable 2 Lb. Barrel, Rocks, Grit, and Patented

National Geographic Magnetic Marble Run STEM Building Set for Kids

Dan&Darci Advanced Professional Rock Tumbler Kit - with Digital 9-Day Polishing Timer & 3 Speed Settings - Turn Rough Rocks into Beautiful Gems

C1 Rock Tumbler Kit, 2.5LB Quiet Rotary Tumbler for Adults & Beginners

A1 Professional Rock Tumbler Kit for Adults, 4LB Capacity, Brushless Motor

Rock Tumbler Double Drum 6LB Lapidary Polisher

National Geographic 3 Lb. Rock Tumbler Kit for Kids and Adult Beginners