1. Rock Tumbling Kit: Polish Your Gemstones: Rock tumbling is an extremely popular hobby for both kids and adults! This professional rock tumbler is fun and easy to use, transforming rough rocks into beautifully polished gemstones thanks to its user-friendly and durable design. The rock tumbling kit makes polishing even easier in an interesting way to transform any raw stone and polish it into super shiny and beautiful gems. Timer Function: The durable motor has a time control setting, so you can set it up and not worry if you forget it. 7-day digital timer (with automatic shut-off function), you can set and repeat it according to your needs, while you want your own beautiful gemstone, which requires a lot of time to grind and polish, so it takes time and patience. Size: 21 x 14.5 x 16.6 cm. 2. Have Fun DIY: Children can collect different stones outdoors and turn them into beautiful and attractive stones. During the operation, children can experience the joy of work, enjoy the feeling of achievement, and promote their curiosity and observation. Detailed instructions on the glass guide guide you step by step through the tumbling process, including fascinating facts about the gemstones in the set. 3. FUN GIFTS FOR ALL AGES: Rock tumbling is not just a rocky glass for kids, but also a rocky glass for adults, making it a fun and high-quality craft tool for kids and families. Surely the perfect gift for Christmas, Children's Day. A rock tumbler can improve children's interest in geography and science and train children's patience. Easy to use: The rock tumbling kit is easy to use and very suitable for beginners, and the instruction manual in the educational playset contains detailed instructions on the operating process for rough stone grinding. Package: 1 x rock tumbler, 1 x raw stone (in the roll), 4 types x (coarse grinding, fine grinding, polishing, final polishing) polishing powder, 2 x ring rings, 1 x necklace + gemstone holder, 1 x keychain, 1 x leather strap (replacement), 1 x power cord with Euro plug, 1 x English instructions.