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Box of a rock tumbler with images of polished stones and text on a black background
Educational rock tumbler kit with various components and a Thames & Kosmos poster.

The Thames & Kosmos Rock Tumbler

$59.99
by Thames & Kosmos
Low stock

Pickup available at Little Lincoln's Toy Shop - Springfield

Usually ready in 24 hours

View store information

Shipping Info

You can expect your order to be shipped out within 1 to 2 business days (unless it's a holiday or the weekend). And guess what? If your order is worth more than $75.00, congratulations! You've just unlocked free shipping! But don't fret if your total is $74.99 or less; we're still happy to ship it for a flat rate of $7.95. For more info, check out our shipping and delivery page!

Order by 12/15/25 for expected delivery by 12/24/25!

Gift Wrap Available

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Pickup Hours & Location

We are now located at 3001 West White Oaks Drive in Springfield.

HOLIDAY HOURS:
Easter Sunday - Closed

Memorial Day - Closed

4th of July - Closed

Labor Day - Closed

Pickup Hours

Monday-Friday 10AM to 6PM

Saturday 10AM to 5PM

Sunday 12PM to 4PM

Spark curiosity in your young explorers with the Thames & Kosmos Rock Tumbler! This engaging STEM kit invites budding geologists to discover the secrets of geology by transforming raw stones into smooth, polished treasures. Featuring a noise-reducing barrel and a powerful motor, it's designed for consistent performance during long polishing sessions. The kit is packed with everything needed to get started: an assortment of authentic rock samples (including amethyst and rose quartz), four polishing grits, jewelry settings for custom keepsakes, and a full-color manual.

Why We Love It

  • Polishes real amethyst, rose quartz, aventurine and more into smooth gemstones.
  • Includes four grits, jewelry settings, and a full-color manual for a complete experience.
  • Explores erosion, weathering, and the geological rock cycle through hands-on STEM learning.

Good to Know

  • Recommended for ages 8 and up.
  • WARNING: CHOKING HAZARD – Small parts. Not for children under 3 yrs.
  • Adult supervision recommended.