Australian Geographic STEM Rock Tumbler

My eight-year-old was thrilled when the first batch came out of the tumbler — the polishing powders really transformed those jagged rocks into smooth, shiny gems. The included jewellery pieces made it easy to turn them into a necklace she wears every day.

After three weeks of tumbling, those ugly rocks from our driveway turned into beautiful polished gems. The included jewellery pieces are a nice bonus, and the polishing powders worked exactly as described. It kept my daughter engaged and curious the whole time.

My son was so excited to see the rough rocks turn smooth overnight—the motor isn't too loud, and the polishing powder really works. We're already planning our next batch of stones for the jewelry pieces.