National Geographic Rock Tumbler Science Set for Child or Teen Ages 8 Years and up

National Geographic Rock Tumbler Science Set for Child or Teen Ages 8 Years and up
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Model: RTNGTUMBLER3
(200)
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Product Details

The National Geographic Hobby Rock Tumbler Kit is a complete rock polishing kit that allows your child or teen to turn rough rocks into gemstones, making it a perfect introduction to Geology & Earth Sciences. Tumbler kit by National Geographic includes one pound of rough gemstones, eight packets of polishing grit, a storage pouch, and five jewelry fastenings. The tumbler base and motor are built to last and the tumbler barrel is designed to be low noise and leak proof. It has a built in timer and automatic shut off switch too. Now your kids can create beautiful keepsakes from your favorite specimens.

CREATE YOUR OWN GEMSTONES - Rock tumbling is a hugely popular hobby for kids and adults! This starter rock tumbler makes it fun and easy to turn rough rocks into beautifully polished gemstones in 3-4 weeks, thanks to its simple operation and durable design. A TUMBLER THAT'S MADE TO LAST - The durable motor allows you to tumble multiple batches of rocks. An improved, leak-proof barrel is lined with rubber for quieter operation while tumbling on the sturdy tumbler base. EASY TO USE AND EDUCATIONAL - Detailed tumbler instructions lead you step-by-step through the rock tumbling process. A full-color learning guide details how rocks are naturally polished and has fascinating facts about the gemstones in the kit. National Geographic STEM series provides kids high-quality educational toys that are a whole lot of fun. Our easy-to-follow instructions lead you step-by-step through each activity. There are also safety glasses, gloves, and an easy-clean experiment tray included.

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Last Updated: 2025-10-20 14:47:54

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Product Specifications

Technical Details

Manufacturer -
Brand National Geographic
Item model number RTNGTUMBLER3
Color Assorted
Weight -
Height -
Depth -

Additional Product Information

Product Id 2790385
User Reviews and Ratings
4.2 (200 ratings)
4.2 out of 5 stars
UPC 810070620486

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National Geographic Rock Tumbler Science Set for Child or Teen Ages 8 Years and up
Reviews: 200
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Top User Reviews and Ratings (10 total reviews)

(5)
Reviewed in the USA on Sep 27, 2025

Bought this for my grandson's 9th birthday. It was a hit.

Anonymous • Review provider: walmart.com
(2)
Reviewed in the USA on Nov 15, 2024

rubber liner inside barrel punctured and made it impossible to open less than one month of purchase.

Anonymous • Review provider: walmart.com
(3)
Reviewed in the USA on Jul 12, 2024

Love this and the idea. However, we can't get the lid to seal shut anymore and we've cleaned it in depth. Sad we are only on stage 3 of the first batch.

Anonymous • Review provider: walmart.com
(1)
Reviewed in the USA on Jan 11, 2023

My son used it, really excited about it. Got through the first step of tumbling and then the tips to the tumbler snapped off and we had to make shift something to continue process. Long story short, stones didn’t come out as expected and tumbler died.

Anonymous • Review provider: walmart.com
(5)
Reviewed in the USA on Nov 19, 2021

This rock tumbler starter kit is designed for all ages, From my 4 year old to my 19 year old absolutely love working with the rock tumbler After tumbling and cleaning the rocks you get to see the amazing changes to the colors Of the rocks and see what type they are, Absolutely recommend this rock tumbler starter kit to anyone Great gift to give..

Anonymous • Review provider: walmart.com
Showing 1 to 5 of 10 reviews
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