1. Rock Tumbler 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 simple operation and durable design. The tumbler kit makes tumbling even easier, offering an interesting way to transform any raw stone and polish it into super shiny and beautiful gems. Timer Function: The durable motor features a timer control setting, so you can set it and forget it. The 7-day digital timer (with automatic shut-off function) allows you to set and repeat as needed. Creating your own beautiful gemstones takes time and patience. Size: 21 x 14.5 x 16.6 cm.2. Have Fun DIY: Children can collect various stones outdoors and transform them into beautiful and attractive gems. During the process, children can experience the joy of working, enjoy the feeling of success, and foster their curiosity and observation skills. Detailed instructions 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 isn't just for kids; it's also a great hobby for adults, making it a fun and high-quality craft tool for children and families. It's the perfect gift for Christmas or Children's Day. A rock tumbler can enhance children's interest in geography and science and train their patience. Easy to Use: The rock tumbling kit is easy to use and very suitable for beginners. The instruction manual in the educational playset provides detailed instructions on the rough stone grinding process. Package: 1 x rock tumbler, 1 x raw stone (in the roller), 4 types x (coarse grinding, fine grinding, polishing, final polishing) polishing powder, 2 x ring rings, 1 x necklace + gemstone holder, 1 x keychain chain, 1 x leather strap (replacement), 1 x power cord with Euro plug, 1 x English instructions.