Rock Tumbler

Available from The Red Balloon Company when we last checked. Sold from the shop’s own store; the price there is the one that counts.

Let’s rock and roll! Amp up your rock collection and explore the secrets of geology with the Thames & Kosmos Rock Tumbler! This custom-designed, user-friendly machine allows budding geologists and gem collectors to transform rough stones into beautiful polished rocks while exploring topics like erosion, weathering, and the geological rock cycle. The kit comes with an assortment of natural rock samples to get you started — including tiger’s eye, aventurine, rose quartz, and more — as well as four