• 4-Stage Polishing & 1-5 Day Adjustable Timer: The ZS-187 rock tumbler (SKU:490500200) features 4 progressive polishing stages (Step 1-4) with specially matched grinding stone powder (4 packs, 50g each). Equipped with a 1-5 day adjustable timer, it adapts to different stone hardness, ensuring smooth transitions from rough grinding to final polishing. No professional skills required—just follow the number order of the powder to get gleaming results

• Child-Safe Detachable Soft Rubber Bucket: Crafted from soft rubber material, the detachable polishing bucket effectively protects kids during use. Paired with a double-layer sealing cover, it strengthens leakage prevention even during long-term operation. No complicated tools needed—adults can easily assemble or disassemble it, while the secure design ensures child safety under adult supervision

• Noise Reduction with Sound Insulation Cover: Equipped with a dedicated noise reduction & sound insulation cover, the tumbler’s noise is cut in half immediately after covering. Enjoy quiet operation at home without disturbing neighbors or family, making it perfect for home use, allowing kids to explore geology without distractions

• All-In-One Complete Starter Kit: No additional purchases needed! The kit includes a rock tumbler body, raw stones, 4 packs of grinding stone powder (50g each), power cord, random measuring cup, noise reduction cover, double-layer sealing cover, and DIY jewelry accessories (necklace & pendant). Everything required for the full polishing process is included—start creating personalized ornaments right after unboxing

• Ideal STEM Gift for Kids: More than a toy, it lets children experience the entire stone polishing process, cultivating hands-on skills, patience, and creativity. As they turn rough stones into dazzling DIY jewelry, they’ll gain a sense of achievement and develop an interest in geology and STEM. It’s a perfect gift to foster a lifelong love for exploration and creation

Product Description

The Rock Tumbler Polisher Kit transforms rough stones into gleaming treasures. It features a 1-5 day adjustable timer for four precise grit stages, making it perfect for hands-on learning. Equipped with a noise reduction cover and double waterproof design, it’s ideal for home use without disturbing others. Encourage kids to explore geology, develop patience, and ignite creativity by turning polished stones into DIY jewelry—combining fun with STEM education.

Key Features:

Four-stage progressive polishing

Noise reduction & sound insulation

1-5 day adjustable timer

Double waterproof anti-leakage

Child-safe soft rubber polishing bucket

DIY jewelry making (necklace & pendant accessories)

Cultivates patience and hands-on ability

Specifications:

Colour: Black

Product Material: ABS + Soft Rubber (Polishing Bucket)

Timer: 1-5 Days (Adjustable)

Grinding Stages: 4 Stages (Step 1-4 Grit Powder)

Grinding Stone Powder: 4 Packs (Each Net Wt 1.76oz/50g)

Products include:

1 x Rock Tumbler Body

1 x Raw Stones

1 x Power Cord

1 x Measuring Cup (Random)

4 x Grinding Stone Powder (Step 1-4, 50g each)

1 x Detachable Soft Rubber Polishing Bucket

1 x Noise Reduction & Sound Insulation Cover

1 x Double-Layer Sealing Cover

1 x Necklace Accessories

1 x Pendant Accessories

1 x User Manual