Blue Marble Explorer Series Rock Tumbler - Kid Science Toys

The National Geographic Explorer Series Rock Tumbler is a complete rock polishing kit that allows your kid to turn rough rocks into gemstones.

This science kit for kids includes one pound of rough gemstones, eight packets of polishing grit, a storage pouch, and five jewelry fastenings.

Blue Marble creates hands-on STEM toys that inspire, nurturing curiosity, encouraging exploration, and emphasizing fun. Blue Marble’s mission is to create purposeful products that inspire a love of learning in children and empower parents to raise thoughtful, confident kids.