NATIONAL GEOGRAPHIC Starter Rock Tumbling Kit - Durable Leak-Proof Polisher for Kids Complete Geology Hobby Science Kit, Rocks and Crystals Kids, A Great STEM Activity
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Availability:
Only 5 left in stock, order soon!
Arrives
Monday, Oct 27
Features
- 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, 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.
- ALL-IN-ONE TUMBLING KIT - This kit has everything you need and then some! You get 12 a pound of rough rocks with nine different types of gemstones inside, five jewelry fastenings, and our four-stage rock polishing grit.
- 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.
- HIGH-QUALITY EDUCATIONAL TOYS - We're proud to make the highest quality hands-on science toys, and all our products are backed by exceptional service. If your experience is less than stellar, let us know and we'll make things right!
Product Dimensions: 10.98 x 5.2 x 12 inches
Item Weight: 4.18 pounds
Item model number: NGTUMBLER2
Manufacturer recommended age: 8 years and up
Is Discontinued By Manufacturer: No
Release date: October 13, 2017
Manufacturer: Discover with Dr. Cool
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Oct 27
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Just got my hands on the national geographic starter rock tumbler kit and I'm absolutely stoked! this thing is a beast, turns rocks into sparkly crystals like a pro (or, like, a kid, lol). it's a bit loud, but hey, it's worth it - just toss it in the garage and let it do its magic. what i love most is that it comes with everything you need to get started - no extra purchases necessary! the leak-proof design is a total win, too. all in all, this thing is a solid 5 stars - perfect for the little geologists out there (or, you know, the slightly-bigger geologists like me)!
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Reviewed in the United States on January 3, 2025 by TRED
im pretty impressed with this little machine, its not that loud and works well. the inside is rubber so less noise ! keep in mind it takes a long time for the effects to happen, set it and forget it, in other words ! it was far more impressive than some of the negative reviews spoke of. its fun and more solid than it looks. there's a simplicity to its functions and an ease of use that are beneficial ! im a big kid anyway, so im going to have fun coming up with ideas for what to put in it. coins, rocks i find on the beach, even some acrylic resin things I've made, i can go on !
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Reviewed in the United States on July 22, 2025 by hari sono
It works as it should. That is a polishes the rocks. However, I’m only giving four stars because the top is hard to get giving a hard to get back on. It doesn’t tighten and it leaks. I have researched the tumbler online and it only says tighten it, but it doesn’t say how. I even put grease around the top to hold it on tighter that doesn’t work. I tried taping it shut and the solution comes through the tape .I will continue to search to find out how to get the lid to close. I am hoping to buy a larger one in the future should my daughter like it, but I’m not certain if this brand is the one that I want to purchase.
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Reviewed in the United States on August 15, 2025 by cheryl
I bought this for a 9 year old going through a geology phase. This is a well made product like most stuff with the NatGeo logo (some of their robots are another thing however). It does exactly what is expected and comes with a nice selection of rocks. It is very loud. Put it somewhere you won't be bothered by noise. A lot of noise. Couple that with the time it takes, 3 to 4 weeks for all 4 cycles or more. If you don't like noise or your child doesn't have patience, this is not the product for you. If your child can wait, and you can tolerate the noise, then it's great. My son really likes when we open it after each of the phases and he can see the progress.
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Reviewed in the United States on November 13, 2022 by Jeffrey Ellis
This works fine. Keep in mind the rocks tumble for 2weeks
Reviewed in the United States on August 13, 2025 by Fishwanda
Wish you could do a zero star. This thing just doesn't close. Eventually it'll turn just enough to close. Finished stage 3 and hit a breaking point to return it but it was 1 day past the return date. I've tried all kinds of oils and lubricants on the rubber, completely removed the rubber interior and reseated it inside. Tried wrenches, channelocks, entire body weight pushing down. I have lots of large enough tools in my garage but nothing works. The only thing that gets the SLIGHTEST bit of a locking turn (it has popped loose in the middle of the week) is putting the base into a table vice, only on the bottom of the barrel, as hard as you can and then using a rubber strap wrench, again putting all of my body weight into turning it. If you put it somewhere in the middle of the barrel it'll squish the plastic and not fit the lid. This is a one and done without being able to return it. Maybe I'll try trimming the rubber on top a bit since I can't return it anyways.
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Reviewed in the United States on August 16, 2025 by Jess K
Our first rock tumbler. at this time, I've only done the rocks that the set came with and used all the grit provided. I have to purchase more grit before I can do rocks that we have personally collected. I am waiting though. Why? Because this thing sounds like a rainstorm in my garage. Yes, I had to keep it in my garage because of the noise level. It is so loud. That is a bummer. Also, it's showing wear and tear already and I have literally ONLY done the rocks it came with. By the time I got to grit 2, I noticed bubbles in the inner liner. When I'd clean it out after a tumble, I'd push the nasty grit mud out of the bubbles and next time, there'd be another bubble in a different location. I've only had it 2-3 months, so I hope this is not indicative of the lifespan of the tumbler. Once that liner starts cracking or breaking, it will no longer function well. Hopefully, the bubbles will not escalate into anything else. Finally, the lid gets harder and harder to remove with time. The first two grits, I could remove it by hand. For grit 3, I had to get my strong teen son to do it...By grit 4, he had to use a jar opener and barely got it open. we try to clean it well between tumbles to ensure no gunky mud build up is present, but that made no difference in our ability to open the container. Pros: Great start up kit for the price, with several good items included; Seemed to accomplish it's purpose of prettying up the rocks. Cons. THE NOISE. IT IS LOUD. Wear and tear on kit after just a couple tumbles and increasing difficulty with opening lid. I won't buy this particular model again...but I would still recommend it to others for a first time tumbler. My kiddos love what it can do and loved the final product.
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Reviewed in the United States on October 31, 2020 by Angelsmom
I got this for my beach rocks/stones. I just wanted them to be more polished. Fun activity
Reviewed in the United States on July 26, 2025 by Victoria Grace