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#MINDBLOWN Rock Tumbler

Prices as of September 25, 2026, as listed by each retailer — verify the current price on the retailer's site before purchase.

Price history tracked at Macy's price tracker

14-day low
$49.92
Sep 12 · Macy's
Best price
$49.92
−0% vs high
14-day high
$49.92
All stores
$50$50$50
Sep 12Sep 25
  • Macy's
Lowest in 14 days: $49.92 at Macy's. Highest: $49.92. Current best is 0% below the 14-day high.

What buyers say

AI summary · 36 reviews

A fun, educational toy that transforms raw rocks into polished gems with clear instructions and included supplies. Some buyers note the process is slow and the tumbler is loud, but most find it worth the wait for the rewarding results.

Liked

  • Easy-to-follow instructions
  • Includes all necessary supplies
  • Produces beautiful polished stones

Complaints

  • Loud operation
  • Long processing time
  • Seal issues with lid gasket

Generated by AI from real customer reviews at Macy's — may miss nuance. Summarized Sep 2026.

About this product

The Discovery #MINDBLOWN Rock Tumbler is a hands-on science kit designed for children aged 8 to 11. It simulates the natural process of gemstone polishing by using a motorized tumbler with a barrel, grit, and rocks to smooth and polish stones over time. The kit includes all necessary components: a motorized base, tumbling barrel, adaptor, 8 bags of grit, strainer, and materials to create jewelry like necklaces, earrings, keychains, and metal rings. This educational toy encourages STEM learning through play, combining curiosity with practical experimentation in geology and material science.

  • Motorized tumbler with barrel
  • Includes 8 bags of grit and rocks
  • Jewelry-making accessories included
  • Suitable for ages 8–11
  • Promotes STEM learning
  • Plastic construction, spot clean only

Based on 36 reviews at Macy's

Read all 36 reviews on Macy's

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#MINDBLOWN Rock Tumbler — Price Tracker & History