Rock Tumbler by Thames & Kosmos

💎✨ Ready to roll into geology fun? The Thames & Kosmos Rock Tumbler makes it easy for kids to transform rough stones into dazzling polished gems! Perfect for budding geologists and curious collectors, this tumbler brings the science of erosion, weathering, and the rock cycle to life. The set includes real rock samples — like amethyst, aventurine, and rose quartz — plus four polishing grits to get you started. With the included jewelry settings, kids can even turn their polished creations into wearable treasures. Built with a powerful, long-lasting motor, a leak-proof, noise-reducing barrel, and a handy built-in timer (up to 7 days!), this machine is designed for durability and ease of use. Once you've polished the starter rocks, keep experimenting with glass, wood, or stones you've collected yourself. 📖 The included manual and poster guide young scientists through every step, packed with fun facts about rock formation and geology. Innovative design at a great value 450g (1 lb+) capacity USB-C power supply For ages 8+ 👉 A classic science tool reinvented for today's young explorers!

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