- Smooth rocks into polished stones with the rock tumbler
- Uses the same process that has worked in oceans for millions of years
- Securely fastens and does not leak
- Clear lid cover suppresses noise
- Entire process takes about 2 days
- Recommended ages 10 years and up
- Includes:
- 3 Bags of stones
- Polishing powder
- 2 Mounting rings/li>