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8 Best Rock Tumblers for Kids

Updated 6 November 2020

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We all know how much kids like to play with rocks, but do they know that they could be holding a potential gemstone in their hands? Rock tumblers are used to smooth and polish rocks by spinning them in a barrel with water and abrasive grit. Simply picking up an ordinary rock could result in a beautiful jewelry-quality stone and a fascinating new hobby to enjoy.

In our list of the 8 best rock tumblers for kids in 2020, we’ve included tumblers to accommodate everyone from beginners to budding geologists through a range of ages. By taking endorsements from real people and throwing out any rock tumblers with fake reviews, we’re confident you’ll find the perfect gift and hopefully receive a fresh diamond in return.

1NATIONAL GEOGRAPHIC Starter Rock Tumbler Kit (Best Budget Option)

This Starter Rock Tumbler Kit features detailed instructions to help kids begin their rock tumbling hobby. There are nine different types of gemstones in the rocks, and all of the rocks weigh out to around 1/2lb. This also comes with five jewelry fastenings and a 4-stage rock polishing grit.

What we love

  • Great as a beginner's set
  • Comes with a good variety of rocks

We dont like this as much

  • Tumbler could use a tighter water seal

2Advanced Professional Rock Tumbler Kit (Best Quality Option)

The Advanced Professional Rock Tumbler Kit is among the best rock tumblers for kids who are more experienced. It includes 1/2lb of assorted rocks, a 1lb capacity barrel, four grit packs, a mesh strainer, and jewelry fasteners. There are various speed controls, easy-to-read LCD screens, and a shutoff timer. There’s an illustrated learning booklet to guide kids and it also comes with a storage bag for the rocks.

What we love

  • Kid-friendly features make it easy to learn
  • Well-built machine that isn't too noisy

We dont like this as much

  • Digital control panel/timer can reset if power is lost

3Discover with Dr. Cool Hobby Rock Tumbler

The Dr. Cool Hobby Rock Tumbler is a “set-it-and-forget-it” type of machine thanks to the programmable timer that helps you not over-tumble the rocks. The 1/2lb rocks include nine different types, and this set also includes four grades of grit, jewelry fastenings, an adventure guide, and an activity book with games and puzzles.

What we love

  • Reliably built and backed with a 2-year warranty
  • User-friendly pre-set mechanism

We dont like this as much

  • Easy to overload, so kids may need supervision


This Hobby Rock Tumbler Kit from National Geographic is one of the 9 best rock tumblers for kids who want to have a long-lasting pastime to enjoy. It features a robust machine that has noise-reduction qualities. There is 1/2lb worth of stones and four levels of grit. This also comes with a reusable GemFoam polisher to give the gems more shine.

What we love

  • Variable speeds and timer functions
  • Moderate amount of noise thanks to the rubber barrel and quiet motor

We dont like this as much

  • Included grit could polish a bit better

5Tru-square Metal Products Model A-R2 Kit Rock Tumbler

The A-R2 Kit Rock Tumbler features a 6lb capacity tumbler in a versatile, 2-barrel design. It is most ideal for use with small batches and it has longevity and safety in mind thanks to the continuous, fan-cooled motor that helps prevent an overload from happening.

What we love

  • Simple and fast setup process
  • Double barrel design lets kids perform two different steps at a time

We dont like this as much

  • Kids might need help removing the barrel lids and with cleaning

6Discover with Dr. Cool PRO Series Rock Tumbler

The Dr. Cool PRO Series Rock Tumbler is one of the 9 best rock tumblers for kids and teens who want a more professional-grade machine. It comes with 1lb of nine different types of rocks, four types of polishing grit, and multiple jewelry fastenings.

What we love

  • Well-designed timer and multi-speed buttons
  • Advanced design while still being easy for kids to learn

We dont like this as much

  • The kit only contains enough rocks and grit for a one-time use

7Advanced Professional Rock Tumbler Kit

With the Advanced Professional Rock Tumbler Kit, teens especially can discover a love of rock tumbling thanks to high-quality features like speed controls and a 9-day timer read on LCD screens. This fun and educational kit includes 1/2lb of assorted rocks, a low-noise 1lb capacity barrel, four grit packets, a storage bag, mesh strainer, and jewelry fasteners.

What we love

  • Well-sealed against leaks
  • Professional-looking machine is durable

We dont like this as much

  • Kids may need help with the setup process


The National Geographic Rock Tumbler Kit is a massive kit to keep older kids and teens entertained for hours on end. It has an improved leak-proof barrel and a durable motor so children can set it up and leave it without worry. This includes 3lbs of nine different rocks, five jewelry fastenings, grit, GemFoam polisher, and a strainer.

What we love

  • Plenty of rocks for multiple uses
  • Rubber barrel absorbs a good deal of sound

We dont like this as much

  • Might have to frequently check that the cycle button hasn't reset itself