National Geographic Hobby Rock Tumbler Ki

Turn rough stones into shiny keepsakes. national geographic hobby rock tumbler kit includes rough gemstones, a rock polisher, and four polishing grits, for ages 8+.

A slow, satisfying little project that feels like a tiny geology lab. you load the rough gemstones, add one of the four polishing grits, and let the rock polisher do its thing. it’s hands-on and oddly calming — part science kit, part craft project. labeled for ages 8+, so kids and grown-ups can both poke around with rocks and learn a bit about how polishing works.